Merge pull request #21947 from github/copilot/codeql-cli-2256

Fix changelog copy errors in change-notes and CHANGELOG.md files (codeql-cli-2.25.6)

.github/workflows/go-version-update.yml

@@ -1,208 +0,0 @@
-name: Update Go version
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "0 3 * * 1"  # Run weekly on Mondays at 3 AM UTC (1 = Monday)
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  update-go-version:
-    name: Check and update Go version
-    if: github.repository == 'github/codeql'
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 0
-
-      - name: Set up Git
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-
-      - name: Fetch latest Go version
-        id: fetch-version
-        run: |
-          LATEST_GO_VERSION=$(curl -s https://go.dev/dl/?mode=json | jq -r '.[0].version')
-          
-          if [ -z "$LATEST_GO_VERSION" ] || [ "$LATEST_GO_VERSION" = "null" ]; then
-            echo "Error: Failed to fetch latest Go version from go.dev"
-            exit 1
-          fi
-          
-          echo "Latest Go version from go.dev: $LATEST_GO_VERSION"
-          echo "version=$LATEST_GO_VERSION" >> $GITHUB_OUTPUT
-          
-          # Extract version numbers (e.g., go1.26.0 -> 1.26.0)
-          LATEST_VERSION_NUM=$(echo $LATEST_GO_VERSION | sed 's/^go//')
-          echo "version_num=$LATEST_VERSION_NUM" >> $GITHUB_OUTPUT
-          
-          # Extract major.minor version (e.g., 1.26.0 -> 1.26)
-          LATEST_MAJOR_MINOR=$(echo $LATEST_VERSION_NUM | sed -E 's/^([0-9]+\.[0-9]+).*/\1/')
-          echo "major_minor=$LATEST_MAJOR_MINOR" >> $GITHUB_OUTPUT
-
-      - name: Check current Go version
-        id: current-version
-        run: |
-          CURRENT_VERSION=$(sed -n 's/.*go_sdk\.download(version = \"\([^\"]*\)\".*/\1/p' MODULE.bazel)
-          
-          if [ -z "$CURRENT_VERSION" ]; then
-            echo "Error: Could not extract Go version from MODULE.bazel"
-            exit 1
-          fi
-          
-          echo "Current Go version in MODULE.bazel: $CURRENT_VERSION"
-          echo "version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
-          
-          # Extract major.minor version
-          CURRENT_MAJOR_MINOR=$(echo $CURRENT_VERSION | sed -E 's/^([0-9]+\.[0-9]+).*/\1/')
-          echo "major_minor=$CURRENT_MAJOR_MINOR" >> $GITHUB_OUTPUT
-
-      - name: Compare versions
-        id: compare
-        run: |
-          LATEST="${{ steps.fetch-version.outputs.version_num }}"
-          CURRENT="${{ steps.current-version.outputs.version }}"
-          
-          echo "Latest: $LATEST"
-          echo "Current: $CURRENT"
-          
-          if [ "$LATEST" = "$CURRENT" ]; then
-            echo "Go version is up to date"
-            echo "needs_update=false" >> $GITHUB_OUTPUT
-          else
-            echo "Go version needs update from $CURRENT to $LATEST"
-            echo "needs_update=true" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Update Go version in files
-        if: steps.compare.outputs.needs_update == 'true'
-        run: |
-          LATEST_VERSION_NUM="${{ steps.fetch-version.outputs.version_num }}"
-          LATEST_MAJOR_MINOR="${{ steps.fetch-version.outputs.major_minor }}"
-          CURRENT_VERSION="${{ steps.current-version.outputs.version }}"
-          CURRENT_MAJOR_MINOR="${{ steps.current-version.outputs.major_minor }}"
-          
-          echo "Updating from $CURRENT_VERSION to $LATEST_VERSION_NUM"
-          
-          # Escape dots in current version strings for use in sed patterns
-          CURRENT_VERSION_ESCAPED=$(echo "$CURRENT_VERSION" | sed 's/\./\\./g')
-          CURRENT_MAJOR_MINOR_ESCAPED=$(echo "$CURRENT_MAJOR_MINOR" | sed 's/\./\\./g')
-          
-          # Update MODULE.bazel
-          sed -i "s/go_sdk\.download(version = \"$CURRENT_VERSION_ESCAPED\")/go_sdk.download(version = \"$LATEST_VERSION_NUM\")/" MODULE.bazel
-          if ! grep -q "go_sdk.download(version = \"$LATEST_VERSION_NUM\")" MODULE.bazel; then
-            echo "Error: Failed to update MODULE.bazel"
-            exit 1
-          fi
-          
-          # Update go/extractor/go.mod
-          if ! sed -i "s/^go $CURRENT_MAJOR_MINOR_ESCAPED\$/go $LATEST_MAJOR_MINOR/" go/extractor/go.mod; then
-            echo "Warning: Failed to update go directive in go.mod"
-          fi
-          if ! sed -i "s/^toolchain go$CURRENT_VERSION_ESCAPED\$/toolchain go$LATEST_VERSION_NUM/" go/extractor/go.mod; then
-            echo "Warning: Failed to update toolchain in go.mod"
-          fi
-          
-          # Update go/extractor/autobuilder/build-environment.go
-          if ! sed -i "s/var maxGoVersion = util\.NewSemVer(\"$CURRENT_MAJOR_MINOR_ESCAPED\")/var maxGoVersion = util.NewSemVer(\"$LATEST_MAJOR_MINOR\")/" go/extractor/autobuilder/build-environment.go; then
-            echo "Warning: Failed to update build-environment.go"
-          fi
-          
-          # Update go/actions/test/action.yml
-          if ! sed -i "s/default: \"~$CURRENT_VERSION_ESCAPED\"/default: \"~$LATEST_VERSION_NUM\"/" go/actions/test/action.yml; then
-            echo "Warning: Failed to update action.yml"
-          fi
-          
-          # Show what changed
-          git diff
-
-      - name: Check for changes
-        id: check-changes
-        if: steps.compare.outputs.needs_update == 'true'
-        run: |
-          if git diff --quiet; then
-            echo "No changes detected"
-            echo "has_changes=false" >> $GITHUB_OUTPUT
-          else
-            echo "Changes detected"
-            echo "has_changes=true" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Check for existing PR
-        if: steps.check-changes.outputs.has_changes == 'true'
-        id: check-pr
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          BRANCH_NAME="workflow/go-version-update"
-          PR_NUMBER=$(gh pr list --head "$BRANCH_NAME" --state open --json number --jq '.[0].number')
-          
-          if [ -n "$PR_NUMBER" ]; then
-            echo "Existing PR found: #$PR_NUMBER"
-            echo "pr_exists=true" >> $GITHUB_OUTPUT
-            echo "pr_number=$PR_NUMBER" >> $GITHUB_OUTPUT
-          else
-            echo "No existing PR found"
-            echo "pr_exists=false" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Commit and push changes
-        if: steps.check-changes.outputs.has_changes == 'true'
-        run: |
-          BRANCH_NAME="workflow/go-version-update"
-          LATEST_VERSION_NUM="${{ steps.fetch-version.outputs.version_num }}"
-          LATEST_MAJOR_MINOR="${{ steps.fetch-version.outputs.major_minor }}"
-          
-          # Create or switch to branch
-          git checkout -B "$BRANCH_NAME"
-          
-          # Stage and commit changes
-          git add MODULE.bazel go/extractor/go.mod go/extractor/autobuilder/build-environment.go go/actions/test/action.yml
-          git commit -m "Go: Update to $LATEST_VERSION_NUM"
-          
-          # Push changes
-          git push --force-with-lease origin "$BRANCH_NAME"
-
-      - name: Create or update PR
-        if: steps.check-changes.outputs.has_changes == 'true'
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          BRANCH_NAME="workflow/go-version-update"
-          LATEST_VERSION_NUM="${{ steps.fetch-version.outputs.version_num }}"
-          CURRENT_VERSION="${{ steps.current-version.outputs.version }}"
-          
-          PR_TITLE="Go: Update to $LATEST_VERSION_NUM"
-          
-          PR_BODY=$(cat <<EOF
-          This PR updates Go from $CURRENT_VERSION to $LATEST_VERSION_NUM.
-
-          Updated files:
-          - \`MODULE.bazel\` - go_sdk.download version
-          - \`go/extractor/go.mod\` - go directive and toolchain
-          - \`go/extractor/autobuilder/build-environment.go\` - maxGoVersion (only if MAJOR.MINOR changes)
-          - \`go/actions/test/action.yml\` - default go-test-version
-
-          This PR was automatically created by the [Go version update workflow](https://github.com/${{ github.repository }}/blob/main/.github/workflows/go-version-update.yml).
-          EOF
-          )
-          
-          if [ "${{ steps.check-pr.outputs.pr_exists }}" = "true" ]; then
-            echo "Updating existing PR #${{ steps.check-pr.outputs.pr_number }}"
-            gh pr edit "${{ steps.check-pr.outputs.pr_number }}" --title "$PR_TITLE" --body "$PR_BODY"
-          else
-            echo "Creating new PR"
-            gh pr create \
-              --title "$PR_TITLE" \
-              --body "$PR_BODY" \
-              --base main \
-              --head "$BRANCH_NAME" \
-              --label "Go"
-          fi

CODEOWNERS

@@ -2,7 +2,7 @@
 * @github/code-scanning-alert-coverage
 
 # CodeQL language libraries
-/actions/ @github/code-scanning-alert-coverage
+/actions/ @github/codeql-dynamic
 /cpp/ @github/codeql-c-analysis
 /csharp/ @github/codeql-csharp
 /csharp/autobuilder/Semmle.Autobuild.Cpp @github/codeql-c-extractor @github/code-scanning-language-coverage
@@ -59,5 +59,9 @@ MODULE.bazel @github/codeql-ci-reviewers
 /.github/workflows/rust.yml @github/codeql-rust
 /.github/workflows/swift.yml @github/codeql-swift
 
+# Misc
+/misc/scripts/accept-expected-changes-from-ci.py @RasmusWL
+/misc/scripts/generate-code-scanning-query-list.py @RasmusWL
+
 # .devcontainer
 /.devcontainer/ @github/codeql-ci-reviewers

MODULE.bazel

@@ -273,7 +273,7 @@ use_repo(
 )
 
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
-go_sdk.download(version = "1.26.4")
+go_sdk.download(version = "1.26.0")
 
 go_deps = use_extension("@gazelle//:extensions.bzl", "go_deps")
 go_deps.from_file(go_mod = "//go/extractor:go.mod")

actions/ql/lib/change-notes/2026-06-12-self_hosted_runners.md

@@ -1,4 +0,0 @@
----
-category: fix
----
-* The query `actions/pr-on-self-hosted-runner` was updated to the latest standard runner labels reducing false positive results.

actions/ql/lib/codeql/actions/ast/internal/Ast.qll

@@ -1920,5 +1920,3 @@ private YamlMappingLikeNode resolveMatrixAccessPath(
     else result = resolveMatrixAccessPath(newRoot, rest)
   )
 }
-
-class Comment = YamlComment;

actions/ql/lib/codeql/actions/ast/internal/Yaml.qll

@@ -52,12 +52,6 @@ private module YamlSig implements LibYaml::InputSig {
   class ParseErrorBase extends LocatableBase, @yaml_error {
     string getMessage() { yaml_errors(this, result) }
   }
-
-  class CommentBase extends LocatableBase, @yaml_comment {
-    string getText() { yaml_comments(this, result, _) }
-
-    override string toString() { yaml_comments(this, _, result) }
-  }
 }
 
 import LibYaml::Make<YamlSig>

actions/ql/lib/codeql/actions/security/SelfHostedQuery.qll

@@ -2,12 +2,10 @@ import actions
 
 bindingset[runner]
 predicate isGithubHostedRunner(string runner) {
-  // The list of github hosted repos:
+  // list of github hosted repos: https://github.com/actions/runner-images/blob/main/README.md#available-images
-  // https://github.com/actions/runner-images/blob/main/README.md#available-images
+  runner
-  // https://docs.github.com/en/enterprise-cloud@latest/actions/how-tos/write-workflows/choose-where-workflows-run/choose-the-runner-for-a-job#standard-github-hosted-runners-for-public-repositories
+      .toLowerCase()
-  runner.toLowerCase().regexpMatch("^ubuntu-([0-9.]+|latest|slim)(-arm)?$") or
+      .regexpMatch("^(ubuntu-([0-9.]+|latest)|macos-([0-9]+|latest)(-x?large)?|windows-([0-9.]+|latest))$")
-  runner.toLowerCase().regexpMatch("^macos-([0-9]+|latest)(-x?large|-intel)?$") or
-  runner.toLowerCase().regexpMatch("^windows-([0-9.]+|latest)(-vs[0-9.]+)?(-arm)?$")
 }
 
 bindingset[runner]

actions/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/actions-all
-version: 0.4.38-dev
+version: 0.4.37
 library: true
 warnOnImplicitThis: true
 dependencies:

actions/ql/src/Security/CWE-829/UntrustedCheckoutMedium.ql

@@ -1,8 +1,8 @@
 /**
- * @name Checkout of untrusted code in a non-privileged context
+ * @name Checkout of untrusted code in a trusted context
- * @description Checking out and running the build script from a fork executes untrusted code. Even in a
+ * @description Privileged workflows have read/write access to the base repository and access to secrets.
- *              non-privileged workflow, this can be abused, for example to compromise self-hosted runners
+ *              By explicitly checking out and running the build script from a fork the untrusted code is running in an environment
- *              or to poison caches and artifacts that are later consumed by privileged workflows.
+ *              that is able to push to the base repository and to access secrets.
  * @kind problem
  * @problem.severity warning
  * @precision medium
@@ -20,4 +20,4 @@ from PRHeadCheckoutStep checkout
 where
   // the checkout occurs in a non-privileged context
   inNonPrivilegedContext(checkout)
-select checkout, "Potential unsafe checkout of untrusted pull request on non-privileged workflow."
+select checkout, "Potential unsafe checkout of untrusted pull request on privileged workflow."

actions/ql/src/change-notes/2026-06-04-untrusted-checkout-medium-metadata.md

@@ -1,4 +0,0 @@
----
-category: queryMetadata
----
-* The name, description, and alert message of `actions/untrusted-checkout/medium` have been corrected to describe a non-privileged context.

actions/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/actions-queries
-version: 0.6.30-dev
+version: 0.6.29
 library: false
 warnOnImplicitThis: true
 groups: [actions, queries]

actions/ql/test/query-tests/Security/CWE-284/.github/workflows/test3.yml

@@ -1,43 +0,0 @@
-name: test
-
-on:
-  pull_request:
-
-jobs:
-  test:
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - ubuntu-24.04
-          - ubuntu-24.04-arm
-          - ubuntu-22.04
-          - ubuntu-22.04-arm
-          - ubuntu-26.04
-          - ubuntu-26.04-arm
-          - ubuntu-slim
-          - macos-26
-          - macos-26-xlarge
-          - macos-26-intel
-          - macos-26-large
-          - macos-latest-large
-          - macos-15-large
-          - macos-15
-          - macos-15-intel
-          - macos-latest
-          - macos-15
-          - macos-15-xlarge
-          - macos-14-large
-          - macos-14
-          - macos-14-xlarge
-          - windows-2025-vs2026
-          - windows-latest
-          - windows-2025
-          - windows-2022
-          - windows-11
-          - windows-11-arm
-          - windows-11-vs2026-arm
-    runs-on: ${{ matrix.os }}
-    steps:
-      - run: cmd

actions/ql/test/query-tests/Security/CWE-829/UntrustedCheckoutMedium.expected

@@ -1,10 +1,10 @@
-| .github/workflows/artifactpoisoning81.yml:11:9:14:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/artifactpoisoning81.yml:11:9:14:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/dependabot2.yml:33:9:38:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/dependabot2.yml:33:9:38:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/mend.yml:22:9:29:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/mend.yml:22:9:29:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/poc3.yml:18:7:25:4 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/poc3.yml:18:7:25:4 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/poc.yml:30:9:36:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/poc.yml:30:9:36:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/priv_pull_request_checkout.yml:14:9:20:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/priv_pull_request_checkout.yml:14:9:20:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/test3.yml:28:9:33:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/test3.yml:28:9:33:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/test4.yml:18:7:25:4 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/test4.yml:18:7:25:4 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/test8.yml:20:9:26:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/test8.yml:20:9:26:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |
-| .github/workflows/test9.yml:11:9:16:6 | Uses Step | Potential unsafe checkout of untrusted pull request on non-privileged workflow. |
+| .github/workflows/test9.yml:11:9:16:6 | Uses Step | Potential unsafe checkout of untrusted pull request on privileged workflow. |

config/identical-files.json

@@ -11,6 +11,10 @@
     "java/ql/lib/semmle/code/java/dataflow/internal/rangeanalysis/SignAnalysisCommon.qll",
     "csharp/ql/lib/semmle/code/csharp/dataflow/internal/rangeanalysis/SignAnalysisCommon.qll"
   ],
+  "Bound Java/C#": [
+    "java/ql/lib/semmle/code/java/dataflow/Bound.qll",
+    "csharp/ql/lib/semmle/code/csharp/dataflow/Bound.qll"
+  ],
   "ModulusAnalysis Java/C#": [
     "java/ql/lib/semmle/code/java/dataflow/ModulusAnalysis.qll",
     "csharp/ql/lib/semmle/code/csharp/dataflow/ModulusAnalysis.qll"

cpp/downgrades/0853f43dc8c08deecb473c54a2b70da8597f1ab5/upgrade.properties

@@ -1,2 +0,0 @@
-description: Fix NameQualifier inconsistency
-compatibility: full

cpp/ql/lib/DefaultOptions.qll

@@ -30,6 +30,8 @@ class Options extends string {
   predicate overrideReturnsNull(Call call) {
     // Used in CVS:
     call.(FunctionCall).getTarget().hasGlobalName("Xstrdup")
+    or
+    CustomOptions::overrideReturnsNull(call) // old Options.qll
   }
 
   /**
@@ -43,6 +45,8 @@ class Options extends string {
     // Used in CVS:
     call.(FunctionCall).getTarget().hasGlobalName("Xstrdup") and
     nullValue(call.getArgument(0))
+    or
+    CustomOptions::returnsNull(call) // old Options.qll
   }
 
   /**
@@ -61,6 +65,8 @@ class Options extends string {
     f.hasGlobalOrStdName([
         "exit", "_exit", "_Exit", "abort", "__assert_fail", "longjmp", "__builtin_unreachable"
       ])
+    or
+    CustomOptions::exits(f) // old Options.qll
   }
 
   /**
@@ -73,7 +79,8 @@ class Options extends string {
    * runtime, the program's behavior is undefined)
    */
   predicate exprExits(Expr e) {
-    e.(AssumeExpr).getChild(0).(CompileTimeConstantInt).getIntValue() = 0
+    e.(AssumeExpr).getChild(0).(CompileTimeConstantInt).getIntValue() = 0 or
+    CustomOptions::exprExits(e) // old Options.qll
   }
 
   /**
@@ -81,7 +88,10 @@ class Options extends string {
    *
    * By default holds only for `fgets`.
    */
-  predicate alwaysCheckReturnValue(Function f) { f.hasGlobalOrStdName("fgets") }
+  predicate alwaysCheckReturnValue(Function f) {
+    f.hasGlobalOrStdName("fgets") or
+    CustomOptions::alwaysCheckReturnValue(f) // old Options.qll
+  }
 
   /**
    * Holds if it is reasonable to ignore the return value of function
@@ -97,6 +107,8 @@ class Options extends string {
     // common way of sleeping using select:
     fc.getTarget().hasGlobalName("select") and
     fc.getArgument(0).getValue() = "0"
+    or
+    CustomOptions::okToIgnoreReturnValue(fc) // old Options.qll
   }
 }
 

cpp/ql/lib/Options.qll

@@ -98,3 +98,57 @@ class CustomMutexType extends MutexType {
    */
   override predicate unlockAccess(FunctionCall fc, Expr arg) { none() }
 }
+
+/**
+ * DEPRECATED: customize `CustomOptions.overrideReturnsNull` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate overrideReturnsNull(Call call) { none() }
+
+/**
+ * DEPRECATED: customize `CustomOptions.returnsNull` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate returnsNull(Call call) { none() }
+
+/**
+ * DEPRECATED: customize `CustomOptions.exits` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate exits(Function f) { none() }
+
+/**
+ * DEPRECATED: customize `CustomOptions.exprExits` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate exprExits(Expr e) { none() }
+
+/**
+ * DEPRECATED: customize `CustomOptions.alwaysCheckReturnValue` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate alwaysCheckReturnValue(Function f) { none() }
+
+/**
+ * DEPRECATED: customize `CustomOptions.okToIgnoreReturnValue` instead.
+ *
+ * This predicate is required to support backwards compatibility for
+ * older `Options.qll` files.  It should not be removed or modified by
+ * end users.
+ */
+predicate okToIgnoreReturnValue(FunctionCall fc) { none() }

cpp/ql/lib/change-notes/2026-05-27-deprecated-removal.md

@@ -1,15 +0,0 @@
----
-category: breaking
----
-* Removed the deprecated `overrideReturnsNull` predicate from `Options.qll`. Use `CustomOptions.overrideReturnsNull` instead.
-* Removed the deprecated `returnsNull` predicate from `Options.qll`. Use `CustomOptions.returnsNull` instead.
-* Removed the deprecated `exits` predicate from `Options.qll`. Use `CustomOptions.exits` instead.
-* Removed the deprecated `exprExits` predicate from `Options.qll`. Use `CustomOptions.exprExits` instead.
-* Removed the deprecated `alwaysCheckReturnValue` predicate from `Options.qll`. Use `CustomOptions.alwaysCheckReturnValue` instead.
-* Removed the deprecated `okToIgnoreReturnValue` predicate from `Options.qll`. Use `CustomOptions.okToIgnoreReturnValue` instead.
-* Removed the deprecated `semmle.code.cpp.Member`. Import `semmle.code.cpp.Element` and/or `semmle.code.cpp.Type` directly.
-* Removed the deprecated `UnknownDefaultLocation` class. Use `UnknownLocation` instead.
-* Removed the deprecated `UnknownExprLocation` class. Use `UnknownLocation` instead.
-* Removed the deprecated `UnknownStmtLocation` class. Use `UnknownLocation` instead.
-* Removed the deprecated `TemplateParameter` class. Use `TypeTemplateParameter` instead.
-* Support for class resolution across link targets has been removed for databases which were created with CodeQL versions before 1.23.0.

cpp/ql/lib/cpp.qll

@@ -32,6 +32,7 @@ import semmle.code.cpp.Class
 import semmle.code.cpp.Struct
 import semmle.code.cpp.Union
 import semmle.code.cpp.Enum
+import semmle.code.cpp.Member
 import semmle.code.cpp.Field
 import semmle.code.cpp.Function
 import semmle.code.cpp.MemberFunction

cpp/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/cpp-all
-version: 10.2.1-dev
+version: 10.2.0
 groups: cpp
 dbscheme: semmlecode.cpp.dbscheme
 extractor: cpp

cpp/ql/lib/semmle/code/cpp/Location.qll

@@ -148,3 +148,28 @@ class UnknownLocation extends Location {
     this.getFile().getAbsolutePath() = "" and locations_default(this, _, 0, 0, 0, 0)
   }
 }
+
+/**
+ * A dummy location which is used when something doesn't have a location in
+ * the source code but needs to have a `Location` associated with it.
+ *
+ * DEPRECATED: use `UnknownLocation`
+ */
+deprecated class UnknownDefaultLocation extends UnknownLocation { }
+
+/**
+ * A dummy location which is used when an expression doesn't have a
+ * location in the source code but needs to have a `Location` associated
+ * with it.
+ *
+ * DEPRECATED: use `UnknownLocation`
+ */
+deprecated class UnknownExprLocation extends UnknownLocation { }
+
+/**
+ * A dummy location which is used when a statement doesn't have a location
+ * in the source code but needs to have a `Location` associated with it.
+ *
+ * DEPRECATED: use `UnknownLocation`
+ */
+deprecated class UnknownStmtLocation extends UnknownLocation { }

cpp/ql/lib/semmle/code/cpp/Member.qll

@@ -0,0 +1,6 @@
+/**
+ * DEPRECATED: import `semmle.code.cpp.Element` and/or `semmle.code.cpp.Type` directly as required.
+ */
+
+import semmle.code.cpp.Element
+import semmle.code.cpp.Type

cpp/ql/lib/semmle/code/cpp/TemplateParameter.qll

@@ -35,6 +35,13 @@ class NonTypeTemplateParameter extends Literal, TemplateParameterImpl {
   override string getAPrimaryQlClass() { result = "NonTypeTemplateParameter" }
 }
 
+/**
+ * A C++ `typename` (or `class`) template parameter.
+ *
+ * DEPRECATED: Use `TypeTemplateParameter` instead.
+ */
+deprecated class TemplateParameter = TypeTemplateParameter;
+
 /**
  * A C++ `typename` (or `class`) template parameter.
  *

cpp/ql/lib/semmle/code/cpp/Type.qll

@@ -1071,7 +1071,7 @@ class NullPointerType extends BuiltInType {
  * const float fa[40];
  * ```
  */
-class DerivedType extends Type, NameQualifyingElement, @derivedtype {
+class DerivedType extends Type, @derivedtype {
   override string toString() { result = this.getName() }
 
   override string getName() { derivedtypes(underlyingElement(this), result, _, _) }

cpp/ql/lib/semmle/code/cpp/dataflow/ExternalFlow.qll

@@ -276,45 +276,6 @@ private predicate isClassConstructedFrom(Class c, Class templateClass) {
   not c.isConstructedFrom(_) and c = templateClass
 }
 
-/** Gets the fully templated version of `c`. */
-private Class getFullyTemplatedClassOld(Class c) {
-  not c.isFromUninstantiatedTemplate(_) and
-  isClassConstructedFrom(c, result)
-}
-
-private TemplateClass getOriginalClassTemplate(TemplateClass tc) {
-  result = tc.getOriginalTemplate()
-  or
-  not exists(tc.getOriginalTemplate()) and
-  result = tc
-}
-
-/** Gets the fully templated version of `c`. */
-private Class getFullyTemplatedClassNew(Class c) {
-  not c.isFromUninstantiatedTemplate(_) and
-  exists(Class mid |
-    c.isConstructedFrom(mid)
-    or
-    not c.isConstructedFrom(_) and c = mid
-  |
-    result = getOriginalClassTemplate(mid)
-    or
-    not mid instanceof TemplateClass and mid = result
-  )
-}
-
-/** Gets the fully templated version of `c`. */
-private Class getFullyTemplatedClass(Class c) {
-  // The `Class::getOriginalTemplate` predicate was introduced in CodeQL
-  // version 2.25.6 and the upgrade script leaves the
-  // `class_template_generated_from` extensionals empty if the database
-  // was generated with an older extractor. So we use the old implementation
-  // if the `class_template_generated_from` extensional is empty.
-  if class_template_generated_from(_, _)
-  then result = getFullyTemplatedClassNew(c)
-  else result = getFullyTemplatedClassOld(c)
-}
-
 /**
  * Holds if `f` is an instantiation of a function template `templateFunc`, or
  * holds with `f = templateFunc` if `f` is not an instantiation of any function
@@ -331,7 +292,7 @@ private predicate isFunctionConstructedFrom(Function f, Function templateFunc) {
 }
 
 /** Gets the fully templated version of `f`. */
-private Function getFullyTemplatedFunctionOld(Function f) {
+Function getFullyTemplatedFunction(Function f) {
   not f.isFromUninstantiatedTemplate(_) and
   (
     exists(Class c, Class templateClass, int i |
@@ -345,46 +306,13 @@ private Function getFullyTemplatedFunctionOld(Function f) {
   )
 }
 
-private TemplateFunction getOriginalFunctionTemplate(TemplateFunction tf) {
-  result = tf.getOriginalTemplate()
-  or
-  not exists(tf.getOriginalTemplate()) and
-  result = tf
-}
-
-/** Gets the fully templated version of `f`. */
-private Function getFullyTemplatedFunctionNew(Function f) {
-  not f.isFromUninstantiatedTemplate(_) and
-  exists(Function mid |
-    f.isConstructedFrom(mid)
-    or
-    not f.isConstructedFrom(_) and f = mid
-  |
-    result = getOriginalFunctionTemplate(mid)
-    or
-    not mid instanceof TemplateFunction and mid = result
-  )
-}
-
-/** Gets the fully templated version of `f`. */
-Function getFullyTemplatedFunction(Function f) {
-  // The `Function::getOriginalTemplate` predicate was introduced in CodeQL
-  // version 2.25.6 and the upgrade script leaves the
-  // `function_template_generated_from` extensionals empty if the database
-  // was generated with an older extractor. So we use the old implementation
-  // if the `function_template_generated_from` extensional is empty.
-  if function_template_generated_from(_, _)
-  then result = getFullyTemplatedFunctionNew(f)
-  else result = getFullyTemplatedFunctionOld(f)
-}
-
 /** Prefixes `const` to `s` if `t` is const, or returns `s` otherwise. */
 bindingset[s, t]
 private string withConst(string s, Type t) {
   if t.isConst() then result = "const " + s else result = s
 }
 
-/** Prefixes `volatile` to `s` if `t` is volatile, or returns `s` otherwise. */
+/** Prefixes `volatile` to `s` if `t` is const, or returns `s` otherwise. */
 bindingset[s, t]
 private string withVolatile(string s, Type t) {
   if t.isVolatile() then result = "volatile " + s else result = s
@@ -562,7 +490,7 @@ pragma[nomagic]
 private string getTypeNameWithoutClassTemplates(Function f, int n, int remaining) {
   // If there is a declaring type then we start by expanding the function templates
   exists(Class template |
-    template = getFullyTemplatedClass(f.getDeclaringType()) and
+    isClassConstructedFrom(f.getDeclaringType(), template) and
     remaining = getNumberOfSupportedClassTemplateArguments(template) and
     result = getTypeNameWithoutFunctionTemplates(f, n, 0)
   )
@@ -574,7 +502,7 @@ private string getTypeNameWithoutClassTemplates(Function f, int n, int remaining
   or
   exists(string mid, TypeTemplateParameter tp, Class template |
     mid = getTypeNameWithoutClassTemplates(f, n, remaining + 1) and
-    template = getFullyTemplatedClass(f.getDeclaringType()) and
+    isClassConstructedFrom(f.getDeclaringType(), template) and
     tp = getSupportedClassTemplateArgument(template, remaining)
   |
     result = mid.replaceAll(tp.getName(), "class:" + remaining.toString())

cpp/ql/lib/semmle/code/cpp/internal/ResolveClass.qll

@@ -1,5 +1,59 @@
 import semmle.code.cpp.Type
 
+/** For upgraded databases without mangled name info. */
+pragma[noinline]
+private string getTopLevelClassName(@usertype c) {
+  not mangled_name(_, _, _) and
+  isClass(c) and
+  usertypes(c, result, _) and
+  not namespacembrs(_, c) and // not in a namespace
+  not member(_, _, c) and // not in some structure
+  not class_instantiation(c, _) // not a template instantiation
+}
+
+/**
+ * For upgraded databases without mangled name info.
+ * Holds if `d` is a unique complete class named `name`.
+ */
+pragma[noinline]
+private predicate existsCompleteWithName(string name, @usertype d) {
+  not mangled_name(_, _, _) and
+  is_complete(d) and
+  name = getTopLevelClassName(d) and
+  onlyOneCompleteClassExistsWithName(name)
+}
+
+/** For upgraded databases without mangled name info. */
+pragma[noinline]
+private predicate onlyOneCompleteClassExistsWithName(string name) {
+  not mangled_name(_, _, _) and
+  strictcount(@usertype c | is_complete(c) and getTopLevelClassName(c) = name) = 1
+}
+
+/**
+ * For upgraded databases without mangled name info.
+ * Holds if `c` is an incomplete class named `name`.
+ */
+pragma[noinline]
+private predicate existsIncompleteWithName(string name, @usertype c) {
+  not mangled_name(_, _, _) and
+  not is_complete(c) and
+  name = getTopLevelClassName(c)
+}
+
+/**
+ * For upgraded databases without mangled name info.
+ * Holds if `c` is an incomplete class, and there exists a unique complete class `d`
+ * with the same name.
+ */
+private predicate oldHasCompleteTwin(@usertype c, @usertype d) {
+  not mangled_name(_, _, _) and
+  exists(string name |
+    existsIncompleteWithName(name, c) and
+    existsCompleteWithName(name, d)
+  )
+}
+
 pragma[noinline]
 private @mangledname getClassMangledName(@usertype c) {
   isClass(c) and
@@ -49,7 +103,10 @@ private module Cached {
   @usertype resolveClass(@usertype c) {
     hasCompleteTwin(c, result)
     or
+    oldHasCompleteTwin(c, result)
+    or
     not hasCompleteTwin(c, _) and
+    not oldHasCompleteTwin(c, _) and
     result = c
   }
 

cpp/ql/lib/semmlecode.cpp.dbscheme

@@ -1430,8 +1430,7 @@ specialnamequalifyingelements(
 @namequalifyingelement = @namespace
                        | @specialnamequalifyingelement
                        | @usertype
-                       | @decltype
+                       | @decltype;
-                       | @derivedtype;
 
 namequalifiers(
     unique int id: @namequalifier,

cpp/ql/lib/upgrades/ef8d209a22e27413aaaeff4446f0ecb9fa2c227b/upgrade.properties

@@ -1,2 +0,0 @@
-description: Fix NameQualifier inconsistency
-compatibility: full

cpp/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/cpp-queries
-version: 1.6.5-dev
+version: 1.6.4
 groups:
   - cpp
   - queries

cpp/ql/test/library-tests/dataflow/external-models/flow.expected

@@ -51,16 +51,13 @@ models
 | 50 | Summary: ; ; false; ymlStepGenerated; ; ; Argument[0]; ReturnValue; taint; df-generated |
 | 51 | Summary: ; ; false; ymlStepManual; ; ; Argument[0]; ReturnValue; taint; manual |
 | 52 | Summary: ; ; false; ymlStepManual_with_body; ; ; Argument[0]; ReturnValue; taint; manual |
-| 53 | Summary: ; TemplateClass1; true; templateFunction2<U,V>; (U,V); ; Argument[1]; ReturnValue; value; manual |
+| 53 | Summary: Azure::Core::IO; BodyStream; true; Read; ; ; Argument[-1]; Argument[*0]; taint; manual |
-| 54 | Summary: ; TemplateClass1<T>; false; templateFunction<U>; (T,U); ; Argument[0]; ReturnValue; value; manual |
+| 54 | Summary: Azure::Core::IO; BodyStream; true; ReadToCount; ; ; Argument[-1]; Argument[*0]; taint; manual |
-| 55 | Summary: ; TemplateClass2<T,U>; true; function; (U,T); ; Argument[1]; ReturnValue; value; manual |
+| 55 | Summary: Azure::Core::IO; BodyStream; true; ReadToEnd; ; ; Argument[-1]; ReturnValue.Element; taint; manual |
-| 56 | Summary: Azure::Core::IO; BodyStream; true; Read; ; ; Argument[-1]; Argument[*0]; taint; manual |
+| 56 | Summary: Azure; Nullable; true; Value; ; ; Argument[-1]; ReturnValue[*]; taint; manual |
-| 57 | Summary: Azure::Core::IO; BodyStream; true; ReadToCount; ; ; Argument[-1]; Argument[*0]; taint; manual |
+| 57 | Summary: boost::asio; ; false; buffer; ; ; Argument[*0]; ReturnValue; taint; manual |
-| 58 | Summary: Azure::Core::IO; BodyStream; true; ReadToEnd; ; ; Argument[-1]; ReturnValue.Element; taint; manual |
-| 59 | Summary: Azure; Nullable; true; Value; ; ; Argument[-1]; ReturnValue[*]; taint; manual |
-| 60 | Summary: boost::asio; ; false; buffer; ; ; Argument[*0]; ReturnValue; taint; manual |
 edges
-| asio_streams.cpp:56:18:56:23 | [summary param] *0 in buffer | asio_streams.cpp:56:18:56:23 | [summary] to write: ReturnValue in buffer | provenance | MaD:60 |
+| asio_streams.cpp:56:18:56:23 | [summary param] *0 in buffer | asio_streams.cpp:56:18:56:23 | [summary] to write: ReturnValue in buffer | provenance | MaD:57 |
 | asio_streams.cpp:87:34:87:44 | read_until output argument | asio_streams.cpp:91:7:91:17 | recv_buffer | provenance | Src:MaD:32  |
 | asio_streams.cpp:87:34:87:44 | read_until output argument | asio_streams.cpp:93:29:93:39 | *recv_buffer | provenance | Src:MaD:32 Sink:MaD:2 |
 | asio_streams.cpp:97:37:97:44 | call to source | asio_streams.cpp:98:7:98:14 | send_str | provenance | TaintFunction |
@@ -69,24 +66,24 @@ edges
 | asio_streams.cpp:100:44:100:62 | call to buffer | asio_streams.cpp:101:7:101:17 | send_buffer | provenance |  |
 | asio_streams.cpp:100:44:100:62 | call to buffer | asio_streams.cpp:103:29:103:39 | *send_buffer | provenance | Sink:MaD:2 |
 | asio_streams.cpp:100:64:100:71 | *send_str | asio_streams.cpp:56:18:56:23 | [summary param] *0 in buffer | provenance |  |
-| asio_streams.cpp:100:64:100:71 | *send_str | asio_streams.cpp:100:44:100:62 | call to buffer | provenance | MaD:60 |
+| asio_streams.cpp:100:64:100:71 | *send_str | asio_streams.cpp:100:44:100:62 | call to buffer | provenance | MaD:57 |
-| azure.cpp:62:10:62:14 | [summary param] this in Value | azure.cpp:62:10:62:14 | [summary] to write: ReturnValue[*] in Value | provenance | MaD:59 |
+| azure.cpp:62:10:62:14 | [summary param] this in Value | azure.cpp:62:10:62:14 | [summary] to write: ReturnValue[*] in Value | provenance | MaD:56 |
-| azure.cpp:113:16:113:19 | [summary param] this in Read | azure.cpp:113:16:113:19 | [summary param] *0 in Read [Return] | provenance | MaD:56 |
+| azure.cpp:113:16:113:19 | [summary param] this in Read | azure.cpp:113:16:113:19 | [summary param] *0 in Read [Return] | provenance | MaD:53 |
-| azure.cpp:114:16:114:26 | [summary param] this in ReadToCount | azure.cpp:114:16:114:26 | [summary param] *0 in ReadToCount [Return] | provenance | MaD:57 |
+| azure.cpp:114:16:114:26 | [summary param] this in ReadToCount | azure.cpp:114:16:114:26 | [summary param] *0 in ReadToCount [Return] | provenance | MaD:54 |
-| azure.cpp:115:30:115:38 | [summary param] this in ReadToEnd | azure.cpp:115:30:115:38 | [summary] to write: ReturnValue.Element in ReadToEnd | provenance | MaD:58 |
+| azure.cpp:115:30:115:38 | [summary param] this in ReadToEnd | azure.cpp:115:30:115:38 | [summary] to write: ReturnValue.Element in ReadToEnd | provenance | MaD:55 |
 | azure.cpp:115:30:115:38 | [summary] to write: ReturnValue.Element in ReadToEnd | azure.cpp:115:30:115:38 | [summary] to write: ReturnValue in ReadToEnd [element] | provenance |  |
 | azure.cpp:253:48:253:60 | *call to GetBodyStream | azure.cpp:253:48:253:60 | *call to GetBodyStream | provenance | Src:MaD:29  |
 | azure.cpp:253:48:253:60 | *call to GetBodyStream | azure.cpp:257:5:257:8 | *resp | provenance |  |
 | azure.cpp:253:48:253:60 | *call to GetBodyStream | azure.cpp:262:5:262:8 | *resp | provenance |  |
 | azure.cpp:253:48:253:60 | *call to GetBodyStream | azure.cpp:266:38:266:41 | *resp | provenance |  |
 | azure.cpp:257:5:257:8 | *resp | azure.cpp:113:16:113:19 | [summary param] this in Read | provenance |  |
-| azure.cpp:257:5:257:8 | *resp | azure.cpp:257:16:257:21 | Read output argument | provenance | MaD:56 |
+| azure.cpp:257:5:257:8 | *resp | azure.cpp:257:16:257:21 | Read output argument | provenance | MaD:53 |
 | azure.cpp:257:16:257:21 | Read output argument | azure.cpp:258:10:258:16 | * ... | provenance |  |
 | azure.cpp:262:5:262:8 | *resp | azure.cpp:114:16:114:26 | [summary param] this in ReadToCount | provenance |  |
-| azure.cpp:262:5:262:8 | *resp | azure.cpp:262:23:262:28 | ReadToCount output argument | provenance | MaD:57 |
+| azure.cpp:262:5:262:8 | *resp | azure.cpp:262:23:262:28 | ReadToCount output argument | provenance | MaD:54 |
 | azure.cpp:262:23:262:28 | ReadToCount output argument | azure.cpp:263:10:263:16 | * ... | provenance |  |
 | azure.cpp:266:38:266:41 | *resp | azure.cpp:115:30:115:38 | [summary param] this in ReadToEnd | provenance |  |
-| azure.cpp:266:38:266:41 | *resp | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | provenance | MaD:58 |
+| azure.cpp:266:38:266:41 | *resp | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | provenance | MaD:55 |
 | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | provenance |  |
 | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | azure.cpp:267:10:267:12 | vec [element] | provenance |  |
 | azure.cpp:267:10:267:12 | vec [element] | azure.cpp:267:10:267:12 | vec | provenance |  |
@@ -103,11 +100,11 @@ edges
 | azure.cpp:281:68:281:84 | *call to ExtractBodyStream | azure.cpp:281:68:281:84 | *call to ExtractBodyStream | provenance | Src:MaD:26  |
 | azure.cpp:281:68:281:84 | *call to ExtractBodyStream | azure.cpp:282:21:282:23 | *call to get | provenance |  |
 | azure.cpp:282:21:282:23 | *call to get | azure.cpp:115:30:115:38 | [summary param] this in ReadToEnd | provenance |  |
-| azure.cpp:282:21:282:23 | *call to get | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | provenance | MaD:58 |
+| azure.cpp:282:21:282:23 | *call to get | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | provenance | MaD:55 |
 | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | azure.cpp:282:10:282:38 | call to ReadToEnd | provenance |  |
 | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | provenance |  |
 | azure.cpp:289:24:289:56 | call to GetHeader | azure.cpp:62:10:62:14 | [summary param] this in Value | provenance |  |
-| azure.cpp:289:24:289:56 | call to GetHeader | azure.cpp:289:63:289:65 | call to Value | provenance | MaD:59 |
+| azure.cpp:289:24:289:56 | call to GetHeader | azure.cpp:289:63:289:65 | call to Value | provenance | MaD:56 |
 | azure.cpp:289:32:289:40 | call to GetHeader | azure.cpp:289:24:289:56 | call to GetHeader | provenance |  |
 | azure.cpp:289:32:289:40 | call to GetHeader | azure.cpp:289:32:289:40 | call to GetHeader | provenance | Src:MaD:30  |
 | azure.cpp:289:63:289:65 | call to Value | azure.cpp:289:63:289:65 | call to Value | provenance |  |
@@ -183,39 +180,6 @@ edges
 | test.cpp:118:11:118:42 | call to callWithNonTypeTemplate | test.cpp:119:10:119:11 | y2 | provenance | Sink:MaD:1 |
 | test.cpp:118:44:118:44 | *x | test.cpp:111:3:111:25 | [summary param] *0 in callWithNonTypeTemplate | provenance |  |
 | test.cpp:118:44:118:44 | *x | test.cpp:118:11:118:42 | call to callWithNonTypeTemplate | provenance | MaD:48 |
-| test.cpp:125:5:125:20 | [summary param] 0 in templateFunction | test.cpp:125:5:125:20 | [summary] to write: ReturnValue in templateFunction | provenance | MaD:54 |
-| test.cpp:128:5:128:21 | [summary param] 1 in templateFunction2 | test.cpp:128:5:128:21 | [summary] to write: ReturnValue in templateFunction2 | provenance | MaD:53 |
-| test.cpp:133:10:133:18 | call to ymlSource | test.cpp:133:10:133:18 | call to ymlSource | provenance | Src:MaD:25  |
-| test.cpp:133:10:133:18 | call to ymlSource | test.cpp:134:45:134:45 | x | provenance |  |
-| test.cpp:134:13:134:43 | call to templateFunction | test.cpp:134:13:134:43 | call to templateFunction | provenance |  |
-| test.cpp:134:13:134:43 | call to templateFunction | test.cpp:135:10:135:10 | y | provenance | Sink:MaD:1 |
-| test.cpp:134:45:134:45 | x | test.cpp:125:5:125:20 | [summary param] 0 in templateFunction | provenance |  |
-| test.cpp:134:45:134:45 | x | test.cpp:134:13:134:43 | call to templateFunction | provenance | MaD:54 |
-| test.cpp:140:4:140:11 | [summary param] 1 in function | test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | provenance | MaD:55 |
-| test.cpp:140:4:140:11 | [summary param] 1 in function | test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | provenance | MaD:55 |
-| test.cpp:146:10:146:18 | call to ymlSource | test.cpp:146:10:146:18 | call to ymlSource | provenance | Src:MaD:25  |
-| test.cpp:146:10:146:18 | call to ymlSource | test.cpp:148:26:148:26 | x | provenance |  |
-| test.cpp:148:10:148:27 | call to function | test.cpp:148:10:148:27 | call to function | provenance |  |
-| test.cpp:148:10:148:27 | call to function | test.cpp:149:10:149:10 | z | provenance | Sink:MaD:1 |
-| test.cpp:148:26:148:26 | x | test.cpp:140:4:140:11 | [summary param] 1 in function | provenance |  |
-| test.cpp:148:26:148:26 | x | test.cpp:148:10:148:27 | call to function | provenance | MaD:55 |
-| test.cpp:155:10:155:18 | call to ymlSource | test.cpp:155:10:155:18 | call to ymlSource | provenance | Src:MaD:25  |
-| test.cpp:155:10:155:18 | call to ymlSource | test.cpp:157:26:157:26 | x | provenance |  |
-| test.cpp:157:13:157:20 | call to function | test.cpp:157:13:157:20 | call to function | provenance |  |
-| test.cpp:157:13:157:20 | call to function | test.cpp:158:10:158:10 | z | provenance | Sink:MaD:1 |
-| test.cpp:157:26:157:26 | x | test.cpp:140:4:140:11 | [summary param] 1 in function | provenance |  |
-| test.cpp:157:26:157:26 | x | test.cpp:157:13:157:20 | call to function | provenance | MaD:55 |
-| test.cpp:164:34:164:34 | x | test.cpp:165:69:165:69 | x | provenance |  |
-| test.cpp:165:12:165:64 | call to templateFunction2 | test.cpp:164:7:164:7 | *templateFunction3 | provenance |  |
-| test.cpp:165:12:165:64 | call to templateFunction2 | test.cpp:165:12:165:64 | call to templateFunction2 | provenance |  |
-| test.cpp:165:69:165:69 | x | test.cpp:128:5:128:21 | [summary param] 1 in templateFunction2 | provenance |  |
-| test.cpp:165:69:165:69 | x | test.cpp:165:12:165:64 | call to templateFunction2 | provenance | MaD:53 |
-| test.cpp:170:10:170:18 | call to ymlSource | test.cpp:170:10:170:18 | call to ymlSource | provenance | Src:MaD:25  |
-| test.cpp:170:10:170:18 | call to ymlSource | test.cpp:172:51:172:51 | x | provenance |  |
-| test.cpp:172:13:172:44 | call to templateFunction3 | test.cpp:172:13:172:44 | call to templateFunction3 | provenance |  |
-| test.cpp:172:13:172:44 | call to templateFunction3 | test.cpp:173:10:173:10 | y | provenance | Sink:MaD:1 |
-| test.cpp:172:51:172:51 | x | test.cpp:164:34:164:34 | x | provenance |  |
-| test.cpp:172:51:172:51 | x | test.cpp:172:13:172:44 | call to templateFunction3 | provenance | MaD:53 |
 | windows.cpp:17:8:17:25 | [summary param] *0 in CommandLineToArgvA | windows.cpp:17:8:17:25 | [summary] to write: ReturnValue[**] in CommandLineToArgvA | provenance | MaD:33 |
 | windows.cpp:22:15:22:29 | *call to GetCommandLineA | windows.cpp:22:15:22:29 | *call to GetCommandLineA | provenance | Src:MaD:3  |
 | windows.cpp:22:15:22:29 | *call to GetCommandLineA | windows.cpp:24:8:24:11 | * ... | provenance |  |
@@ -519,43 +483,6 @@ nodes
 | test.cpp:118:11:118:42 | call to callWithNonTypeTemplate | semmle.label | call to callWithNonTypeTemplate |
 | test.cpp:118:44:118:44 | *x | semmle.label | *x |
 | test.cpp:119:10:119:11 | y2 | semmle.label | y2 |
-| test.cpp:125:5:125:20 | [summary param] 0 in templateFunction | semmle.label | [summary param] 0 in templateFunction |
-| test.cpp:125:5:125:20 | [summary] to write: ReturnValue in templateFunction | semmle.label | [summary] to write: ReturnValue in templateFunction |
-| test.cpp:128:5:128:21 | [summary param] 1 in templateFunction2 | semmle.label | [summary param] 1 in templateFunction2 |
-| test.cpp:128:5:128:21 | [summary] to write: ReturnValue in templateFunction2 | semmle.label | [summary] to write: ReturnValue in templateFunction2 |
-| test.cpp:133:10:133:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:133:10:133:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:134:13:134:43 | call to templateFunction | semmle.label | call to templateFunction |
-| test.cpp:134:13:134:43 | call to templateFunction | semmle.label | call to templateFunction |
-| test.cpp:134:45:134:45 | x | semmle.label | x |
-| test.cpp:135:10:135:10 | y | semmle.label | y |
-| test.cpp:140:4:140:11 | [summary param] 1 in function | semmle.label | [summary param] 1 in function |
-| test.cpp:140:4:140:11 | [summary param] 1 in function | semmle.label | [summary param] 1 in function |
-| test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | semmle.label | [summary] to write: ReturnValue in function |
-| test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | semmle.label | [summary] to write: ReturnValue in function |
-| test.cpp:146:10:146:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:146:10:146:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:148:10:148:27 | call to function | semmle.label | call to function |
-| test.cpp:148:10:148:27 | call to function | semmle.label | call to function |
-| test.cpp:148:26:148:26 | x | semmle.label | x |
-| test.cpp:149:10:149:10 | z | semmle.label | z |
-| test.cpp:155:10:155:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:155:10:155:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:157:13:157:20 | call to function | semmle.label | call to function |
-| test.cpp:157:13:157:20 | call to function | semmle.label | call to function |
-| test.cpp:157:26:157:26 | x | semmle.label | x |
-| test.cpp:158:10:158:10 | z | semmle.label | z |
-| test.cpp:164:7:164:7 | *templateFunction3 | semmle.label | *templateFunction3 |
-| test.cpp:164:34:164:34 | x | semmle.label | x |
-| test.cpp:165:12:165:64 | call to templateFunction2 | semmle.label | call to templateFunction2 |
-| test.cpp:165:12:165:64 | call to templateFunction2 | semmle.label | call to templateFunction2 |
-| test.cpp:165:69:165:69 | x | semmle.label | x |
-| test.cpp:170:10:170:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:170:10:170:18 | call to ymlSource | semmle.label | call to ymlSource |
-| test.cpp:172:13:172:44 | call to templateFunction3 | semmle.label | call to templateFunction3 |
-| test.cpp:172:13:172:44 | call to templateFunction3 | semmle.label | call to templateFunction3 |
-| test.cpp:172:51:172:51 | x | semmle.label | x |
-| test.cpp:173:10:173:10 | y | semmle.label | y |
 | windows.cpp:17:8:17:25 | [summary param] *0 in CommandLineToArgvA | semmle.label | [summary param] *0 in CommandLineToArgvA |
 | windows.cpp:17:8:17:25 | [summary] to write: ReturnValue[**] in CommandLineToArgvA | semmle.label | [summary] to write: ReturnValue[**] in CommandLineToArgvA |
 | windows.cpp:22:15:22:29 | *call to GetCommandLineA | semmle.label | *call to GetCommandLineA |
@@ -761,11 +688,6 @@ subpaths
 | test.cpp:25:35:25:35 | x | test.cpp:6:5:6:27 | [summary param] 0 in ymlStepManual_with_body | test.cpp:6:5:6:27 | [summary] to write: ReturnValue in ymlStepManual_with_body | test.cpp:25:11:25:33 | call to ymlStepManual_with_body |
 | test.cpp:32:41:32:41 | x | test.cpp:7:47:7:52 | value2 | test.cpp:7:5:7:30 | *ymlStepGenerated_with_body | test.cpp:32:11:32:36 | call to ymlStepGenerated_with_body |
 | test.cpp:118:44:118:44 | *x | test.cpp:111:3:111:25 | [summary param] *0 in callWithNonTypeTemplate | test.cpp:111:3:111:25 | [summary] to write: ReturnValue in callWithNonTypeTemplate | test.cpp:118:11:118:42 | call to callWithNonTypeTemplate |
-| test.cpp:134:45:134:45 | x | test.cpp:125:5:125:20 | [summary param] 0 in templateFunction | test.cpp:125:5:125:20 | [summary] to write: ReturnValue in templateFunction | test.cpp:134:13:134:43 | call to templateFunction |
-| test.cpp:148:26:148:26 | x | test.cpp:140:4:140:11 | [summary param] 1 in function | test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | test.cpp:148:10:148:27 | call to function |
-| test.cpp:157:26:157:26 | x | test.cpp:140:4:140:11 | [summary param] 1 in function | test.cpp:140:4:140:11 | [summary] to write: ReturnValue in function | test.cpp:157:13:157:20 | call to function |
-| test.cpp:165:69:165:69 | x | test.cpp:128:5:128:21 | [summary param] 1 in templateFunction2 | test.cpp:128:5:128:21 | [summary] to write: ReturnValue in templateFunction2 | test.cpp:165:12:165:64 | call to templateFunction2 |
-| test.cpp:172:51:172:51 | x | test.cpp:164:34:164:34 | x | test.cpp:164:7:164:7 | *templateFunction3 | test.cpp:172:13:172:44 | call to templateFunction3 |
 | windows.cpp:27:36:27:38 | *cmd | windows.cpp:17:8:17:25 | [summary param] *0 in CommandLineToArgvA | windows.cpp:17:8:17:25 | [summary] to write: ReturnValue[**] in CommandLineToArgvA | windows.cpp:27:17:27:34 | **call to CommandLineToArgvA |
 | windows.cpp:537:40:537:41 | *& ... | windows.cpp:473:17:473:37 | [summary param] *1 in RtlCopyVolatileMemory | windows.cpp:473:17:473:37 | [summary param] *0 in RtlCopyVolatileMemory [Return] | windows.cpp:537:27:537:37 | RtlCopyVolatileMemory output argument |
 | windows.cpp:542:38:542:39 | *& ... | windows.cpp:479:17:479:35 | [summary param] *1 in RtlCopyDeviceMemory | windows.cpp:479:17:479:35 | [summary param] *0 in RtlCopyDeviceMemory [Return] | windows.cpp:542:25:542:35 | RtlCopyDeviceMemory output argument |

cpp/ql/test/library-tests/dataflow/external-models/flow.ext.yml

@@ -18,7 +18,4 @@ extensions:
       - ["", "", False, "ymlStepManual_with_body", "", "", "Argument[0]", "ReturnValue", "taint", "manual"]
       - ["", "", False, "ymlStepGenerated_with_body", "", "", "Argument[0]", "ReturnValue", "taint", "df-generated"]
       - ["", "", False, "callWithArgument", "", "", "Argument[1]", "Argument[0].Parameter[0]", "value", "manual"]
-      - ["", "", False, "callWithNonTypeTemplate<T>", "(const T &)", "", "Argument[*0]", "ReturnValue", "value", "manual"]
+      - ["", "", False, "callWithNonTypeTemplate<T>", "(const T &)", "", "Argument[*0]", "ReturnValue", "value", "manual"]
-      - ["", "TemplateClass1<T>", False, "templateFunction<U>", "(T,U)", "", "Argument[0]", "ReturnValue", "value", "manual"]
-      - ["", "TemplateClass1", True, "templateFunction2<U,V>", "(U,V)", "", "Argument[1]", "ReturnValue", "value", "manual"]
-      - ["", "TemplateClass2<T,U>", True, "function", "(U,T)", "", "Argument[1]", "ReturnValue", "value", "manual"]

cpp/ql/test/library-tests/dataflow/external-models/sinks.expected

@@ -15,7 +15,3 @@
 | test.cpp:89:11:89:11 | y | test-sink |
 | test.cpp:116:10:116:11 | y1 | test-sink |
 | test.cpp:119:10:119:11 | y2 | test-sink |
-| test.cpp:135:10:135:10 | y | test-sink |
-| test.cpp:149:10:149:10 | z | test-sink |
-| test.cpp:158:10:158:10 | z | test-sink |
-| test.cpp:173:10:173:10 | y | test-sink |

cpp/ql/test/library-tests/dataflow/external-models/sources.expected

@@ -9,10 +9,6 @@
 | test.cpp:56:8:56:16 | call to ymlSource | local |
 | test.cpp:94:10:94:18 | call to ymlSource | local |
 | test.cpp:114:10:114:18 | call to ymlSource | local |
-| test.cpp:133:10:133:18 | call to ymlSource | local |
-| test.cpp:146:10:146:18 | call to ymlSource | local |
-| test.cpp:155:10:155:18 | call to ymlSource | local |
-| test.cpp:170:10:170:18 | call to ymlSource | local |
 | windows.cpp:22:15:22:29 | *call to GetCommandLineA | local |
 | windows.cpp:34:17:34:38 | *call to GetEnvironmentStringsA | local |
 | windows.cpp:39:36:39:38 | GetEnvironmentVariableA output argument | local |

cpp/ql/test/library-tests/dataflow/external-models/test.cpp

@@ -118,57 +118,3 @@ void test_callWithNonTypeTemplate() {
 	int y2 = callWithNonTypeTemplate<int, 10>(x);
 	ymlSink(y2); // $ ir
 }
-
-template<class T>
-struct TemplateClass1 {
-  template<class U>
-  U templateFunction(T, U);
-
-	template<class U, class V>
-  V templateFunction2(U, V);
-};
-
-void test_template_function_in_template_class() {
-	TemplateClass1<int> b;
-	int x = ymlSource();
-	auto y = b.templateFunction<unsigned long>(x, 0UL);
-	ymlSink(y); // $ ir
-}
-
-template<class S, class T>
-struct TemplateClass2 {
-	T function(T, S);
-};
-
-template<class V> using PartialInstantiationOfTemplateClass2 = TemplateClass2<int, V>;
-
-void test_partial_class_instantiation() {
-	int x = ymlSource();
-	PartialInstantiationOfTemplateClass2<unsigned long> y;
-	int z = y.function(0UL, x);
-	ymlSink(z); // $ ir
-}
-
-template<class V> struct DeriveFromFromPartialTemplateInstantiation : TemplateClass2<int, V> { };
-
-void test_inheritance() {
-	int x = ymlSource();
-	DeriveFromFromPartialTemplateInstantiation<long> y;
-	auto z = y.function(0L, x);
-	ymlSink(z); // $ ir
-}
-
-template<class T>
-struct Class1 : TemplateClass1<T> {
-  template<class U>
-  int templateFunction3(U u, int x) {
-    return TemplateClass1<T>::template templateFunction2<U, int>(u, x);
-  }
-};
-
-void test_class1() {
-	int x = ymlSource();
-	Class1<int> c;
-	auto y = c.templateFunction3<unsigned long>(0UL, x);
-	ymlSink(y); // $ ir
-}

cpp/ql/test/library-tests/dataflow/taint-tests/test_mad-signatures.expected

@@ -27383,55 +27383,54 @@ getParameterTypeName
 | stl.h:91:24:91:33 | operator++ | 0 | int |
 | stl.h:95:44:95:44 | back_inserter | 0 | func:0 & |
 | stl.h:95:44:95:44 | back_inserter | 0 | func:0 & |
-| stl.h:147:12:147:23 | basic_string | 0 | const class:2 & |
+| stl.h:148:3:148:14 | basic_string | 0 | const class:2 & |
-| stl.h:148:3:148:14 | basic_string | 0 | const class:0 * |
+| stl.h:149:33:149:44 | basic_string | 0 | const class:0 * |
-| stl.h:148:3:148:14 | basic_string | 1 | const class:2 & |
+| stl.h:149:33:149:44 | basic_string | 1 | const class:2 & |
-| stl.h:149:33:149:44 | basic_string | 0 | func:0 |
+| stl.h:151:16:151:20 | c_str | 0 | func:0 |
-| stl.h:149:33:149:44 | basic_string | 1 | func:0 |
+| stl.h:151:16:151:20 | c_str | 1 | func:0 |
-| stl.h:149:33:149:44 | basic_string | 2 | const class:2 & |
+| stl.h:151:16:151:20 | c_str | 2 | const class:2 & |
-| stl.h:165:8:165:16 | push_back | 0 | class:0 |
 | stl.h:173:13:173:22 | operator[] | 0 | size_type |
 | stl.h:175:13:175:14 | at | 0 | size_type |
-| stl.h:176:35:176:44 | operator+= | 0 | const func:0 & |
+| stl.h:176:35:176:44 | operator+= | 0 | size_type |
-| stl.h:176:35:176:44 | operator+= | 0 | const func:0 & |
+| stl.h:176:35:176:44 | operator+= | 0 | size_type |
-| stl.h:177:17:177:26 | operator+= | 0 | const class:0 * |
+| stl.h:177:17:177:26 | operator+= | 0 | const func:0 & |
-| stl.h:178:17:178:22 | append | 0 | const basic_string & |
+| stl.h:178:17:178:22 | append | 0 | const class:0 * |
-| stl.h:179:17:179:22 | append | 0 | const class:0 * |
+| stl.h:179:17:179:22 | append | 0 | const basic_string & |
-| stl.h:180:17:180:22 | append | 0 | size_type |
+| stl.h:180:17:180:22 | append | 0 | const class:0 * |
-| stl.h:180:17:180:22 | append | 1 | class:0 |
+| stl.h:181:47:181:52 | append | 0 | size_type |
-| stl.h:181:47:181:52 | append | 0 | func:0 |
+| stl.h:181:47:181:52 | append | 1 | class:0 |
-| stl.h:181:47:181:52 | append | 1 | func:0 |
+| stl.h:182:17:182:22 | assign | 0 | func:0 |
-| stl.h:182:17:182:22 | assign | 0 | const basic_string & |
+| stl.h:182:17:182:22 | assign | 1 | func:0 |
-| stl.h:183:17:183:22 | assign | 0 | size_type |
+| stl.h:183:17:183:22 | assign | 0 | const basic_string & |
-| stl.h:183:17:183:22 | assign | 1 | class:0 |
+| stl.h:184:47:184:52 | assign | 0 | size_type |
-| stl.h:184:47:184:52 | assign | 0 | func:0 |
+| stl.h:184:47:184:52 | assign | 1 | class:0 |
-| stl.h:184:47:184:52 | assign | 1 | func:0 |
+| stl.h:185:17:185:22 | insert | 0 | func:0 |
-| stl.h:185:17:185:22 | insert | 0 | size_type |
+| stl.h:185:17:185:22 | insert | 1 | func:0 |
-| stl.h:185:17:185:22 | insert | 1 | const basic_string & |
 | stl.h:186:17:186:22 | insert | 0 | size_type |
-| stl.h:186:17:186:22 | insert | 1 | size_type |
+| stl.h:186:17:186:22 | insert | 1 | const basic_string & |
-| stl.h:186:17:186:22 | insert | 2 | class:0 |
 | stl.h:187:17:187:22 | insert | 0 | size_type |
-| stl.h:187:17:187:22 | insert | 1 | const class:0 * |
+| stl.h:187:17:187:22 | insert | 1 | size_type |
-| stl.h:188:12:188:17 | insert | 0 | const_iterator |
+| stl.h:187:17:187:22 | insert | 2 | class:0 |
-| stl.h:188:12:188:17 | insert | 1 | size_type |
+| stl.h:188:12:188:17 | insert | 0 | size_type |
-| stl.h:188:12:188:17 | insert | 2 | class:0 |
+| stl.h:188:12:188:17 | insert | 1 | const class:0 * |
 | stl.h:189:42:189:47 | insert | 0 | const_iterator |
-| stl.h:189:42:189:47 | insert | 1 | func:0 |
+| stl.h:189:42:189:47 | insert | 1 | size_type |
-| stl.h:189:42:189:47 | insert | 2 | func:0 |
+| stl.h:189:42:189:47 | insert | 2 | class:0 |
-| stl.h:190:17:190:23 | replace | 0 | size_type |
+| stl.h:190:17:190:23 | replace | 0 | const_iterator |
-| stl.h:190:17:190:23 | replace | 1 | size_type |
+| stl.h:190:17:190:23 | replace | 1 | func:0 |
-| stl.h:190:17:190:23 | replace | 2 | const basic_string & |
+| stl.h:190:17:190:23 | replace | 2 | func:0 |
 | stl.h:191:17:191:23 | replace | 0 | size_type |
 | stl.h:191:17:191:23 | replace | 1 | size_type |
-| stl.h:191:17:191:23 | replace | 2 | size_type |
+| stl.h:191:17:191:23 | replace | 2 | const basic_string & |
-| stl.h:191:17:191:23 | replace | 3 | class:0 |
+| stl.h:192:13:192:16 | copy | 0 | size_type |
-| stl.h:192:13:192:16 | copy | 0 | class:0 * |
 | stl.h:192:13:192:16 | copy | 1 | size_type |
 | stl.h:192:13:192:16 | copy | 2 | size_type |
-| stl.h:194:16:194:21 | substr | 0 | size_type |
+| stl.h:192:13:192:16 | copy | 3 | class:0 |
-| stl.h:194:16:194:21 | substr | 1 | size_type |
+| stl.h:193:8:193:12 | clear | 0 | class:0 * |
-| stl.h:195:8:195:11 | swap | 0 | basic_string & |
+| stl.h:193:8:193:12 | clear | 1 | size_type |
+| stl.h:193:8:193:12 | clear | 2 | size_type |
+| stl.h:195:8:195:11 | swap | 0 | size_type |
+| stl.h:195:8:195:11 | swap | 1 | size_type |
 | stl.h:198:94:198:102 | operator+ | 0 | const basic_string & |
 | stl.h:198:94:198:102 | operator+ | 1 | const basic_string & |
 | stl.h:199:94:199:102 | operator+ | 0 | const basic_string & |

cpp/ql/test/library-tests/friends/loop/friends.expected

@@ -1,14 +1,14 @@
+| file://:0:0:0:0 | E<C>'s friend | loop.cpp:5:26:5:26 | E<D> |
 | file://:0:0:0:0 | E<C>'s friend | loop.cpp:5:26:5:26 | E<T> |
-| file://:0:0:0:0 | E<C>'s friend | loop.cpp:5:26:5:29 | E<D> |
+| file://:0:0:0:0 | E<C>'s friend | loop.cpp:10:26:10:26 | F<D> |
 | file://:0:0:0:0 | E<C>'s friend | loop.cpp:10:26:10:26 | F<T> |
-| file://:0:0:0:0 | E<C>'s friend | loop.cpp:10:26:10:29 | F<D> |
+| file://:0:0:0:0 | E<D>'s friend | loop.cpp:5:26:5:26 | E<C> |
 | file://:0:0:0:0 | E<D>'s friend | loop.cpp:5:26:5:26 | E<T> |
-| file://:0:0:0:0 | E<D>'s friend | loop.cpp:5:26:5:29 | E<C> |
+| file://:0:0:0:0 | E<D>'s friend | loop.cpp:10:26:10:26 | F<D> |
 | file://:0:0:0:0 | E<D>'s friend | loop.cpp:10:26:10:26 | F<T> |
-| file://:0:0:0:0 | E<D>'s friend | loop.cpp:10:26:10:29 | F<D> |
+| file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:26 | E<C> |
+| file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:26 | E<D> |
 | file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:26 | E<T> |
-| file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:29 | E<C> |
-| file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:29 | E<D> |
 | loop.cpp:6:5:6:5 | E<T>'s friend | loop.cpp:5:26:5:26 | E<T> |
 | loop.cpp:7:5:7:5 | E<T>'s friend | loop.cpp:7:36:7:36 | F<U> |
 | loop.cpp:11:5:11:5 | F<T>'s friend | loop.cpp:11:36:11:36 | E<U> |

cpp/ql/test/library-tests/name_qualifiers/NameQualifiers1.expected

@@ -1,7 +1,3 @@
-| inconsistency2.cpp:3:3:3:5 | T:: | inconsistency2.cpp:3:3:3:6 | x | inconsistency2.cpp:2:20:2:20 | T |
-| inconsistency2.cpp:3:3:3:11 | const s:: | inconsistency2.cpp:3:3:3:6 | x | file://:0:0:0:0 | const s |
-| inconsistency.cpp:7:20:7:22 | S:: | inconsistency.cpp:7:20:7:23 | (int)... | inconsistency.cpp:4:8:4:8 | S |
-| inconsistency.cpp:7:20:7:22 | S:: | inconsistency.cpp:7:20:7:23 | A | inconsistency.cpp:4:8:4:8 | S |
 | name_qualifiers.cpp:29:7:29:8 | :: | name_qualifiers.cpp:29:7:29:9 | x | file://:0:0:0:0 | (global namespace) |
 | name_qualifiers.cpp:31:7:31:10 | N1:: | name_qualifiers.cpp:31:7:31:12 | nx | name_qualifiers.cpp:4:11:4:12 | N1 |
 | name_qualifiers.cpp:34:7:34:8 | :: | name_qualifiers.cpp:34:9:34:12 | N1:: | file://:0:0:0:0 | (global namespace) |

cpp/ql/test/library-tests/name_qualifiers/NameQualifiers1.ql

@@ -1,5 +1,7 @@
 import cpp
 
 from NameQualifier nq, Location l
-where l = nq.getQualifiedElement().getLocation()
+where
+  l = nq.getQualifiedElement().getLocation() and
+  l.getFile().getShortName() = "name_qualifiers"
 select nq, nq.getQualifiedElement(), nq.getQualifyingElement()

cpp/ql/test/library-tests/name_qualifiers/inconsistency.cpp

@@ -1,8 +1,8 @@
 // This file is present to test whether name-qualifying an enum constant leads to a database inconsistency.
-
+// As such, there is no QL part of the test.
 
 struct S { enum E { A }; };
 
-static void f() {
+static int f() {
   switch(0) { case S::A: break; }
 }

cpp/ql/test/library-tests/name_qualifiers/inconsistency2.cpp

@@ -1,12 +0,0 @@
-namespace {
-template <typename T> T f() {
-  T::x;
-  return {};
-}
-struct s {
-  static int x;
-};
-struct t {
-  s x = f<const s>();
-};
-}

csharp/autobuilder/Semmle.Autobuild.CSharp.Tests/BuildScripts.cs

@@ -135,7 +135,7 @@ namespace Semmle.Autobuild.CSharp.Tests
             if (!EnumerateFiles.TryGetValue(dir, out var str))
                 throw new ArgumentException("Missing EnumerateFiles " + dir);
 
-            return str.Split("\n").Select(p => PathJoin(dir, p));
+            return str.Split("\n").Select(p => PathCombine(dir, p));
         }
 
         public IDictionary<string, string> EnumerateDirectories { get; } = new Dictionary<string, string>();
@@ -147,7 +147,7 @@ namespace Semmle.Autobuild.CSharp.Tests
 
             return string.IsNullOrEmpty(str)
                 ? Enumerable.Empty<string>()
-                : str.Split("\n").Select(p => PathJoin(dir, p));
+                : str.Split("\n").Select(p => PathCombine(dir, p));
         }
 
         public bool IsWindows { get; set; }
@@ -170,7 +170,7 @@ namespace Semmle.Autobuild.CSharp.Tests
 
         bool IBuildActions.IsMonoInstalled() => IsMonoInstalled;
 
-        public string PathJoin(params string[] parts)
+        public string PathCombine(params string[] parts)
         {
             return string.Join(IsWindows ? '\\' : '/', parts.Where(p => !string.IsNullOrWhiteSpace(p)));
         }

csharp/autobuilder/Semmle.Autobuild.CSharp/DotNetRule.cs

@@ -109,7 +109,7 @@ namespace Semmle.Autobuild.CSharp
             => WithDotNet(builder, ensureDotNetAvailable: false, (_, env) => f(env));
 
         private static string DotNetCommand(IBuildActions actions, string? dotNetPath) =>
-            dotNetPath is not null ? actions.PathJoin(dotNetPath, "dotnet") : "dotnet";
+            dotNetPath is not null ? actions.PathCombine(dotNetPath, "dotnet") : "dotnet";
 
         private static CommandBuilder GetCleanCommand(IBuildActions actions, string? dotNetPath, IDictionary<string, string>? environment)
         {

csharp/autobuilder/Semmle.Autobuild.Cpp.Tests/BuildScripts.cs

@@ -158,7 +158,7 @@ namespace Semmle.Autobuild.Cpp.Tests
 
         bool IBuildActions.IsMonoInstalled() => IsMonoInstalled;
 
-        string IBuildActions.PathJoin(params string[] parts)
+        string IBuildActions.PathCombine(params string[] parts)
         {
             return string.Join(IsWindows ? '\\' : '/', parts.Where(p => !string.IsNullOrWhiteSpace(p)));
         }

csharp/autobuilder/Semmle.Autobuild.Shared/Autobuilder.cs

@@ -108,7 +108,7 @@ namespace Semmle.Autobuild.Shared
         /// </summary>
         /// <param name="path">The relative path.</param>
         /// <returns>True iff the path was found.</returns>
-        public bool HasRelativePath(string path) => HasPath(Actions.PathJoin(RootDirectory, path));
+        public bool HasRelativePath(string path) => HasPath(Actions.PathCombine(RootDirectory, path));
 
         /// <summary>
         /// List of project/solution files to build.

csharp/autobuilder/Semmle.Autobuild.Shared/BuildTools.cs

@@ -32,7 +32,7 @@ namespace Semmle.Autobuild.Shared
                 yield break;
 
             // Attempt to use vswhere to find installations of Visual Studio
-            var vswhere = actions.PathJoin(programFilesx86, "Microsoft Visual Studio", "Installer", "vswhere.exe");
+            var vswhere = actions.PathCombine(programFilesx86, "Microsoft Visual Studio", "Installer", "vswhere.exe");
 
             if (actions.FileExists(vswhere))
             {
@@ -51,14 +51,14 @@ namespace Semmle.Autobuild.Shared
                             if (majorVersion < 15)
                             {
                                 // Visual Studio 2015 and below
-                                yield return new VcVarsBatFile(actions.PathJoin(vsInstallation.InstallationPath, @"VC\vcvarsall.bat"), majorVersion);
+                                yield return new VcVarsBatFile(actions.PathCombine(vsInstallation.InstallationPath, @"VC\vcvarsall.bat"), majorVersion);
                             }
                             else
                             {
                                 // Visual Studio 2017 and above
-                                yield return new VcVarsBatFile(actions.PathJoin(vsInstallation.InstallationPath, @"VC\Auxiliary\Build\vcvars32.bat"), majorVersion);
+                                yield return new VcVarsBatFile(actions.PathCombine(vsInstallation.InstallationPath, @"VC\Auxiliary\Build\vcvars32.bat"), majorVersion);
-                                yield return new VcVarsBatFile(actions.PathJoin(vsInstallation.InstallationPath, @"VC\Auxiliary\Build\vcvars64.bat"), majorVersion);
+                                yield return new VcVarsBatFile(actions.PathCombine(vsInstallation.InstallationPath, @"VC\Auxiliary\Build\vcvars64.bat"), majorVersion);
-                                yield return new VcVarsBatFile(actions.PathJoin(vsInstallation.InstallationPath, @"Common7\Tools\VsDevCmd.bat"), majorVersion);
+                                yield return new VcVarsBatFile(actions.PathCombine(vsInstallation.InstallationPath, @"Common7\Tools\VsDevCmd.bat"), majorVersion);
                             }
                         }
                         // else: Skip installation without a version
@@ -68,10 +68,10 @@ namespace Semmle.Autobuild.Shared
             }
 
             // vswhere not installed or didn't run correctly - return legacy Visual Studio versions
-            yield return new VcVarsBatFile(actions.PathJoin(programFilesx86, @"Microsoft Visual Studio 14.0\VC\vcvarsall.bat"), 14);
+            yield return new VcVarsBatFile(actions.PathCombine(programFilesx86, @"Microsoft Visual Studio 14.0\VC\vcvarsall.bat"), 14);
-            yield return new VcVarsBatFile(actions.PathJoin(programFilesx86, @"Microsoft Visual Studio 12.0\VC\vcvarsall.bat"), 12);
+            yield return new VcVarsBatFile(actions.PathCombine(programFilesx86, @"Microsoft Visual Studio 12.0\VC\vcvarsall.bat"), 12);
-            yield return new VcVarsBatFile(actions.PathJoin(programFilesx86, @"Microsoft Visual Studio 11.0\VC\vcvarsall.bat"), 11);
+            yield return new VcVarsBatFile(actions.PathCombine(programFilesx86, @"Microsoft Visual Studio 11.0\VC\vcvarsall.bat"), 11);
-            yield return new VcVarsBatFile(actions.PathJoin(programFilesx86, @"Microsoft Visual Studio 10.0\VC\vcvarsall.bat"), 10);
+            yield return new VcVarsBatFile(actions.PathCombine(programFilesx86, @"Microsoft Visual Studio 10.0\VC\vcvarsall.bat"), 10);
         }
 
         /// <summary>

csharp/autobuilder/Semmle.Autobuild.Shared/MsBuildRule.cs

@@ -60,7 +60,7 @@ namespace Semmle.Autobuild.Shared
             // Use `nuget.exe` from source code repo, if present, otherwise first attempt with global
             // `nuget` command, and if that fails, attempt to download `nuget.exe` from nuget.org
             var nuget = builder.GetFilename("nuget.exe").Select(t => t.Item1).FirstOrDefault() ?? "nuget";
-            var nugetDownloadPath = builder.Actions.PathJoin(FileUtils.GetTemporaryWorkingDirectory(builder.Actions.GetEnvironmentVariable, builder.Options.Language.UpperCaseName, out _), ".nuget", "nuget.exe");
+            var nugetDownloadPath = builder.Actions.PathCombine(FileUtils.GetTemporaryWorkingDirectory(builder.Actions.GetEnvironmentVariable, builder.Options.Language.UpperCaseName, out _), ".nuget", "nuget.exe");
             var nugetDownloaded = false;
 
             var ret = BuildScript.Success;

csharp/autobuilder/Semmle.Autobuild.Shared/Project.cs

@@ -107,9 +107,8 @@ namespace Semmle.Autobuild.Shared
                             continue;
                         }
 
-                        var includePath = builder.Actions.PathJoin(include.Value.Split('\\', StringSplitOptions.RemoveEmptyEntries));
+                        var includePath = builder.Actions.PathCombine(include.Value.Split('\\', StringSplitOptions.RemoveEmptyEntries));
-                        var path = Path.IsPathRooted(includePath) ? includePath : builder.Actions.PathJoin(DirectoryName, includePath);
+                        ret.Add(new Project<TAutobuildOptions>(builder, builder.Actions.PathCombine(DirectoryName, includePath)));
-                        ret.Add(new Project<TAutobuildOptions>(builder, path));
                     }
                     return ret;
                 });

csharp/autobuilder/Semmle.Autobuild.Shared/Solution.cs

@@ -79,7 +79,7 @@ namespace Semmle.Autobuild.Shared
 
             includedProjects = solution.ProjectsInOrder
                 .Where(p => p.ProjectType == SolutionProjectType.KnownToBeMSBuildFormat)
-                .Select(p => builder.Actions.PathJoin(DirectoryName, builder.Actions.PathJoin(p.RelativePath.Split('\\', StringSplitOptions.RemoveEmptyEntries))))
+                .Select(p => builder.Actions.PathCombine(DirectoryName, builder.Actions.PathCombine(p.RelativePath.Split('\\', StringSplitOptions.RemoveEmptyEntries))))
                 .Select(p => new Project<TAutobuildOptions>(builder, p))
                 .ToArray();
         }

csharp/downgrades/d13c4c187d7318fd2b8f35c7e8d7f4dc26be68b1/upgrade.properties

@@ -1,2 +0,0 @@
-description: Restructure and rename types related to operations.
-compatibility: full

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DependencyContainer.cs

@@ -50,7 +50,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 return;
             }
 
-            var path = Path.Join(p, ParseFilePath(d));
+            var path = Path.Combine(p, ParseFilePath(d));
             Paths.Add(path);
             Packages.Add(GetPackageName(p));
         }

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DependencyManager.cs

@@ -75,7 +75,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 }
             }
 
-            this.diagnosticsWriter = new DiagnosticsStream(Path.Join(
+            this.diagnosticsWriter = new DiagnosticsStream(Path.Combine(
                 diagDirEnv ?? "",
                 $"dependency-manager-{DateTime.UtcNow:yyyyMMddHHmm}-{Environment.ProcessId}.jsonc"));
             this.sourceDir = new DirectoryInfo(srcDir);
@@ -327,7 +327,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         private void RemoveNugetPackageReference(string packagePrefix, ISet<AssemblyLookupLocation> dllLocations)
         {
             var packageFolder = nugetPackageRestorer.PackageDirectory.DirInfo.FullName.ToLowerInvariant();
-            var packagePathPrefix = Path.Join(packageFolder, packagePrefix.ToLowerInvariant());
+            var packagePathPrefix = Path.Combine(packageFolder, packagePrefix.ToLowerInvariant());
             var toRemove = dllLocations.Where(s => s.Path.StartsWith(packagePathPrefix, StringComparison.InvariantCultureIgnoreCase));
             foreach (var path in toRemove)
             {

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DotNet.cs

@@ -31,7 +31,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             }
         }
 
-        private DotNet(ILogger logger, string? dotNetPath, TemporaryDirectory tempWorkingDirectory, DependabotProxy? dependabotProxy) : this(new DotNetCliInvoker(logger, Path.Join(dotNetPath ?? string.Empty, "dotnet"), dependabotProxy), logger, dotNetPath is null, tempWorkingDirectory) { }
+        private DotNet(ILogger logger, string? dotNetPath, TemporaryDirectory tempWorkingDirectory, DependabotProxy? dependabotProxy) : this(new DotNetCliInvoker(logger, Path.Combine(dotNetPath ?? string.Empty, "dotnet"), dependabotProxy), logger, dotNetPath is null, tempWorkingDirectory) { }
 
         internal static IDotNet Make(IDotNetCliInvoker dotnetCliInvoker, ILogger logger, bool runDotnetInfo) => new DotNet(dotnetCliInvoker, logger, runDotnetInfo);
 
@@ -73,7 +73,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 var path = ".empty";
                 if (tempWorkingDirectory != null)
                 {
-                    path = Path.Join(tempWorkingDirectory.ToString(), "emptyFakeDotnetRoot");
+                    path = Path.Combine(tempWorkingDirectory.ToString(), "emptyFakeDotnetRoot");
                     Directory.CreateDirectory(path);
                 }
 
@@ -303,7 +303,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 }
                 else
                 {
-                    var dotnetInstallPath = actions.PathJoin(tempWorkingDirectory, ".dotnet", "dotnet-install.sh");
+                    var dotnetInstallPath = actions.PathCombine(tempWorkingDirectory, ".dotnet", "dotnet-install.sh");
                     var downloadDotNetInstallSh = BuildScript.DownloadFile(
                         "https://dot.net/v1/dotnet-install.sh",
                         dotnetInstallPath,
@@ -339,7 +339,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                     };
                 }
 
-                var dotnetInfo = InfoScript(actions, actions.PathJoin(path, "dotnet"), MinimalEnvironment.ToDictionary(), logger);
+                var dotnetInfo = InfoScript(actions, actions.PathCombine(path, "dotnet"), MinimalEnvironment.ToDictionary(), logger);
 
                 Func<string, BuildScript> getInstallAndVerify = version =>
                     // run `dotnet --info` after install, to check that it executes successfully
@@ -384,7 +384,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         /// </summary>
         public static BuildScript WithDotNet(IBuildActions actions, ILogger logger, IEnumerable<string> files, string tempWorkingDirectory, bool shouldCleanUp, bool ensureDotNetAvailable, string? version, Func<string?, BuildScript> f)
         {
-            var installDir = actions.PathJoin(tempWorkingDirectory, ".dotnet");
+            var installDir = actions.PathCombine(tempWorkingDirectory, ".dotnet");
             var installScript = DownloadDotNet(actions, logger, files, tempWorkingDirectory, shouldCleanUp, installDir, version, ensureDotNetAvailable);
             return BuildScript.Bind(installScript, installed =>
             {

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DotNetVersion.cs

@@ -12,7 +12,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         private string FullVersion =>
             version.ToString();
 
-        public string FullPath => Path.Join(dir, FullVersion);
+        public string FullPath => Path.Combine(dir, FullVersion);
 
         /**
          * The full path to the reference assemblies for this runtime.
@@ -33,7 +33,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 {
                     directories[^2] = "packs";
                     directories[^1] = $"{directories[^1]}.Ref";
-                    return Path.Join(string.Join(Path.DirectorySeparatorChar, directories), FullVersion, "ref");
+                    return Path.Combine(string.Join(Path.DirectorySeparatorChar, directories), FullVersion, "ref");
                 }
                 return null;
             }

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/FeedManager.cs

@@ -1,413 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.Immutable;
-using System.IO;
-using System.Linq;
-using System.Net;
-using System.Net.Http;
-using System.Security.Cryptography.X509Certificates;
-using System.Text;
-using System.Text.RegularExpressions;
-using System.Threading;
-using System.Threading.Tasks;
-using Semmle.Util;
-using Semmle.Util.Logging;
-
-namespace Semmle.Extraction.CSharp.DependencyFetching
-{
-    internal sealed partial class FeedManager : IDisposable
-    {
-        internal const string PublicNugetOrgFeed = "https://api.nuget.org/v3/index.json";
-
-        private readonly ILogger logger;
-        private readonly IDotNet dotnet;
-        private readonly FileProvider fileProvider;
-        private readonly DependabotProxy? dependabotProxy;
-        private readonly DependencyDirectory emptyPackageDirectory;
-
-        public ImmutableHashSet<string> PrivateRegistryFeeds { get; }
-        public bool HasPrivateRegistryFeeds { get; }
-        public bool CheckNugetFeedResponsiveness { get; } = EnvironmentVariables.GetBooleanOptOut(EnvironmentVariableNames.CheckNugetFeedResponsiveness);
-
-        public FeedManager(ILogger logger, IDotNet dotnet, DependabotProxy? dependabotProxy, FileProvider fileProvider)
-        {
-            this.logger = logger;
-            this.dotnet = dotnet;
-            this.dependabotProxy = dependabotProxy;
-            this.fileProvider = fileProvider;
-            PrivateRegistryFeeds = dependabotProxy?.RegistryURLs.ToImmutableHashSet() ?? [];
-            HasPrivateRegistryFeeds = PrivateRegistryFeeds.Count > 0;
-            emptyPackageDirectory = new DependencyDirectory("empty", "empty package", logger);
-        }
-
-        private string? GetDirectoryName(string path)
-        {
-            try
-            {
-                return new FileInfo(path).Directory?.FullName;
-            }
-            catch (Exception exc)
-            {
-                logger.LogWarning($"Failed to get directory of '{path}': {exc}");
-            }
-            return null;
-        }
-
-        private IEnumerable<string> GetFeeds(Func<IList<string>> getNugetFeeds)
-        {
-            var results = getNugetFeeds();
-            var regex = EnabledNugetFeed();
-            foreach (var result in results)
-            {
-                var match = regex.Match(result);
-                if (!match.Success)
-                {
-                    logger.LogError($"Failed to parse feed from '{result}'");
-                    continue;
-                }
-
-                var url = match.Groups[1].Value;
-                if (!url.StartsWith("https://", StringComparison.InvariantCultureIgnoreCase) &&
-                    !url.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
-                {
-                    logger.LogInfo($"Skipping feed '{url}' as it is not a valid URL.");
-                    continue;
-                }
-
-                if (!string.IsNullOrWhiteSpace(url))
-                {
-                    yield return url;
-                }
-            }
-        }
-
-        private IEnumerable<string> GetFeedsFromFolder(string folderPath) =>
-            GetFeeds(() => dotnet.GetNugetFeedsFromFolder(folderPath));
-
-
-        private IEnumerable<string> GetFeedsFromNugetConfig(string nugetConfigPath) =>
-            GetFeeds(() => dotnet.GetNugetFeeds(nugetConfigPath));
-
-        private string FeedsToRestoreArgument(IEnumerable<string> feeds)
-        {
-            // If there are no feeds, we want to override any default feeds that `dotnet restore` would use by passing a dummy source argument.
-            if (!feeds.Any())
-            {
-                return $" -s \"{emptyPackageDirectory.DirInfo.FullName}\"";
-            }
-
-            // Add package sources. If any are present, they override all sources specified in
-            // the configuration file(s).
-            var feedArgs = new StringBuilder();
-            foreach (var feed in feeds)
-            {
-                feedArgs.Append($" -s \"{feed}\"");
-            }
-
-            return feedArgs.ToString();
-        }
-
-        /// <summary>
-        /// Constructs the list of NuGet sources to use for this restore.
-        /// (1) Use the feeds we get from `dotnet nuget list source`
-        /// (2) Use private registries, if they are configured
-        /// </summary>
-        /// <param name="path">Path to project/solution</param>
-        /// <param name="reachableFeeds">The set of reachable NuGet feeds.</param>
-        /// <returns>A string representing the NuGet sources argument for the restore command.</returns>
-        public string? MakeRestoreSourcesArgument(string path, HashSet<string> reachableFeeds)
-        {
-            // Do not construct a set of explicit NuGet sources to use for restore.
-            if (!CheckNugetFeedResponsiveness && !HasPrivateRegistryFeeds)
-            {
-                return null;
-            }
-
-            // Find the path specific feeds.
-            var folder = GetDirectoryName(path);
-            var feedsToConsider = folder is not null ? GetFeedsFromFolder(folder).ToHashSet() : new HashSet<string>();
-
-            if (HasPrivateRegistryFeeds)
-            {
-                feedsToConsider.UnionWith(PrivateRegistryFeeds);
-            }
-
-            var feedsToUse = CheckNugetFeedResponsiveness
-                ? feedsToConsider.Where(reachableFeeds.Contains)
-                : feedsToConsider;
-
-            return FeedsToRestoreArgument(feedsToUse);
-        }
-
-        private (int initialTimeout, int tryCount) GetFeedRequestSettings(bool isFallback)
-        {
-            int timeoutMilliSeconds = isFallback && int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessInitialTimeoutForFallback), out timeoutMilliSeconds)
-                ? timeoutMilliSeconds
-                : int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessInitialTimeout), out timeoutMilliSeconds)
-                    ? timeoutMilliSeconds
-                    : 1000;
-            logger.LogDebug($"Initial timeout for NuGet feed reachability check is {timeoutMilliSeconds}ms.");
-
-            int tryCount = isFallback && int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessRequestCountForFallback), out tryCount)
-                ? tryCount
-                : int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessRequestCount), out tryCount)
-                    ? tryCount
-                    : 4;
-            logger.LogDebug($"Number of tries for NuGet feed reachability check is {tryCount}.");
-
-            return (timeoutMilliSeconds, tryCount);
-        }
-
-        private static async Task<HttpResponseMessage> ExecuteGetRequest(string address, HttpClient httpClient, CancellationToken cancellationToken)
-        {
-            return await httpClient.GetAsync(address, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
-        }
-
-        private bool IsFeedReachable(string feed, int timeoutMilliSeconds, int tryCount, out bool isTimeout)
-        {
-            logger.LogInfo($"Checking if NuGet feed '{feed}' is reachable...");
-
-            // Configure the HttpClient to be aware of the Dependabot Proxy, if used.
-            HttpClientHandler httpClientHandler = new();
-            if (dependabotProxy != null)
-            {
-                httpClientHandler.Proxy = new WebProxy(dependabotProxy.Address);
-
-                if (dependabotProxy.Certificate != null)
-                {
-                    httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, _) =>
-                    {
-                        if (chain is null || cert is null)
-                        {
-                            var msg = cert is null && chain is null
-                                ? "certificate and chain"
-                                : chain is null
-                                    ? "chain"
-                                    : "certificate";
-                            logger.LogWarning($"Dependabot proxy certificate validation failed due to missing {msg}");
-                            return false;
-                        }
-                        chain.ChainPolicy.TrustMode = X509ChainTrustMode.CustomRootTrust;
-                        chain.ChainPolicy.CustomTrustStore.Add(dependabotProxy.Certificate);
-                        return chain.Build(cert);
-                    };
-                }
-            }
-
-            using HttpClient client = new(httpClientHandler);
-
-            isTimeout = false;
-
-            for (var i = 0; i < tryCount; i++)
-            {
-                using var cts = new CancellationTokenSource();
-                cts.CancelAfter(timeoutMilliSeconds);
-                try
-                {
-                    logger.LogInfo($"Attempt {i + 1}/{tryCount} to reach NuGet feed '{feed}'.");
-                    using var response = ExecuteGetRequest(feed, client, cts.Token).GetAwaiter().GetResult();
-                    response.EnsureSuccessStatusCode();
-                    logger.LogInfo($"Querying NuGet feed '{feed}' succeeded.");
-                    return true;
-                }
-                catch (Exception exc)
-                {
-                    if (exc is TaskCanceledException tce &&
-                        tce.CancellationToken == cts.Token &&
-                        cts.Token.IsCancellationRequested)
-                    {
-                        logger.LogInfo($"Didn't receive answer from NuGet feed '{feed}' in {timeoutMilliSeconds}ms.");
-                        timeoutMilliSeconds *= 2;
-                        continue;
-                    }
-
-                    logger.LogInfo($"Querying NuGet feed '{feed}' failed. The reason for the failure: {exc.Message}");
-                    return false;
-                }
-            }
-
-            logger.LogWarning($"Didn't receive answer from NuGet feed '{feed}'. Tried it {tryCount} times.");
-            isTimeout = true;
-            return false;
-        }
-
-        /// <summary>
-        /// Retrieves a list of excluded NuGet feeds from the corresponding environment variable.
-        /// </summary>
-        private HashSet<string> GetExcludedFeeds()
-        {
-            var excludedFeeds = EnvironmentVariables.GetURLs(EnvironmentVariableNames.ExcludedNugetFeedsFromResponsivenessCheck)
-                .ToHashSet();
-
-            if (excludedFeeds.Count > 0)
-            {
-                logger.LogInfo($"Excluded NuGet feeds from responsiveness check: {string.Join(", ", excludedFeeds.OrderBy(f => f))}");
-            }
-
-            return excludedFeeds;
-        }
-
-        /// <summary>
-        /// Checks that we can connect to the specified NuGet feeds.
-        /// </summary>
-        /// <param name="feeds">The set of package feeds to check.</param>
-        /// <param name="reachableFeeds">The list of feeds that were reachable.</param>
-        /// <returns>
-        /// True if there is a timeout when trying to reach the feeds (excluding any feeds that are configured
-        /// to be excluded from the check) or false otherwise.
-        /// </returns>
-        public bool CheckSpecifiedFeeds(HashSet<string> feeds, out HashSet<string> reachableFeeds)
-        {
-            // Exclude any feeds from the feed check that are configured by the corresponding environment variable.
-            // These feeds are always assumed to be reachable.
-            var excludedFeeds = GetExcludedFeeds();
-
-            HashSet<string> feedsToCheck = feeds.Where(feed =>
-            {
-                if (excludedFeeds.Contains(feed))
-                {
-                    logger.LogInfo($"Not checking reachability of NuGet feed '{feed}' as it is in the list of excluded feeds.");
-                    return false;
-                }
-                return true;
-            }).ToHashSet();
-
-            reachableFeeds = GetReachableNuGetFeeds(feedsToCheck, isFallback: false, out var isTimeout).ToHashSet();
-
-            // Always consider feeds excluded for the reachability check as reachable.
-            reachableFeeds.UnionWith(feeds.Where(feed => excludedFeeds.Contains(feed)));
-
-            return isTimeout;
-        }
-
-        public bool IsDefaultFeedReachable()
-        {
-            if (CheckNugetFeedResponsiveness)
-            {
-                var (initialTimeout, tryCount) = GetFeedRequestSettings(isFallback: false);
-                return IsFeedReachable(PublicNugetOrgFeed, initialTimeout, tryCount, out var _);
-            }
-
-            return true;
-        }
-
-        /// <summary>
-        /// Tests which of the feeds given by <paramref name="feedsToCheck"/> are reachable.
-        /// </summary>
-        /// <param name="feedsToCheck">The feeds to check.</param>
-        /// <param name="isFallback">Whether the feeds are fallback feeds or not.</param>
-        /// <param name="isTimeout">Whether a timeout occurred while checking the feeds.</param>
-        /// <returns>The list of feeds that could be reached.</returns>
-        private List<string> GetReachableNuGetFeeds(HashSet<string> feedsToCheck, bool isFallback, out bool isTimeout)
-        {
-            var fallbackStr = isFallback ? "fallback " : "";
-            logger.LogInfo($"Checking {fallbackStr}NuGet feed reachability on feeds: {string.Join(", ", feedsToCheck.OrderBy(f => f))}");
-
-            var (initialTimeout, tryCount) = GetFeedRequestSettings(isFallback);
-            var timeout = false;
-            var reachableFeeds = feedsToCheck
-                .Where(feed =>
-                {
-                    var reachable = IsFeedReachable(feed, initialTimeout, tryCount, out var feedTimeout);
-                    timeout |= feedTimeout;
-                    return reachable;
-                })
-                .ToList();
-
-            if (reachableFeeds.Count == 0)
-            {
-                logger.LogWarning($"No {fallbackStr}NuGet feeds are reachable.");
-            }
-            else
-            {
-                logger.LogInfo($"Reachable {fallbackStr}NuGet feeds: {string.Join(", ", reachableFeeds.OrderBy(f => f))}");
-            }
-
-            isTimeout = timeout;
-            return reachableFeeds;
-        }
-
-        public List<string> GetReachableFallbackNugetFeeds(HashSet<string>? feedsFromNugetConfigs)
-        {
-            var fallbackFeeds = EnvironmentVariables.GetURLs(EnvironmentVariableNames.FallbackNugetFeeds).ToHashSet();
-            if (fallbackFeeds.Count == 0)
-            {
-                fallbackFeeds.Add(PublicNugetOrgFeed);
-                logger.LogInfo($"No fallback NuGet feeds specified. Adding default feed: {PublicNugetOrgFeed}");
-
-                var shouldAddNugetConfigFeeds = EnvironmentVariables.GetBooleanOptOut(EnvironmentVariableNames.AddNugetConfigFeedsToFallback);
-                logger.LogInfo($"Adding feeds from nuget.config to fallback restore: {shouldAddNugetConfigFeeds}");
-
-                if (shouldAddNugetConfigFeeds && feedsFromNugetConfigs?.Count > 0)
-                {
-                    // There are some feeds in `feedsFromNugetConfigs` that have already been checked for reachability, we could skip those.
-                    // But we might use different responsiveness testing settings when we try them in the fallback logic, so checking them again is safer.
-                    fallbackFeeds.UnionWith(feedsFromNugetConfigs);
-                    logger.LogInfo($"Using NuGet feeds from nuget.config files as fallback feeds: {string.Join(", ", feedsFromNugetConfigs.OrderBy(f => f))}");
-                }
-            }
-
-            return GetReachableNuGetFeeds(fallbackFeeds, isFallback: true, out var _);
-        }
-
-        public (HashSet<string> explicitFeeds, HashSet<string> allFeeds) GetAllFeeds()
-        {
-            var nugetConfigs = fileProvider.NugetConfigs;
-
-            // Find feeds that are explicitly configured in the NuGet configuration files that we found.
-            var explicitFeeds = nugetConfigs
-                .SelectMany(GetFeedsFromNugetConfig)
-                .ToHashSet();
-
-            if (explicitFeeds.Count > 0)
-            {
-                logger.LogInfo($"Found {explicitFeeds.Count} NuGet feeds in nuget.config files: {string.Join(", ", explicitFeeds.OrderBy(f => f))}");
-            }
-            else
-            {
-                logger.LogDebug("No NuGet feeds found in nuget.config files.");
-            }
-
-            // If private package registries are configured for C#, then consider those
-            // in addition to the ones that are configured in `nuget.config` files.
-            if (HasPrivateRegistryFeeds)
-            {
-                logger.LogInfo($"Found {PrivateRegistryFeeds.Count} private registry feeds configured for C#: {string.Join(", ", PrivateRegistryFeeds.OrderBy(f => f))}");
-                explicitFeeds.UnionWith(PrivateRegistryFeeds);
-            }
-
-            HashSet<string> allFeeds = [];
-
-            // Add all explicitFeeds to the set of all feeds.
-            allFeeds.UnionWith(explicitFeeds);
-
-            // Obtain the list of feeds from the root source directory.
-            // If a NuGet file is present it will be respected, otherwise we will just get the machine/environment specific feeds.
-            var nugetFeedsFromRoot = GetFeedsFromFolder(fileProvider.SourceDir.FullName);
-            allFeeds.UnionWith(nugetFeedsFromRoot);
-
-            if (nugetConfigs.Count > 0)
-            {
-                var nugetConfigFeeds = nugetConfigs
-                    .Select(GetDirectoryName)
-                    .Where(folder => folder != null)
-                    .SelectMany(folder => GetFeedsFromFolder(folder!))
-                    .ToHashSet();
-
-                allFeeds.UnionWith(nugetConfigFeeds);
-            }
-
-            logger.LogInfo($"Found {allFeeds.Count} NuGet feeds (with inherited ones) in nuget.config files: {string.Join(", ", allFeeds.OrderBy(f => f))}");
-
-            return (explicitFeeds, allFeeds);
-        }
-
-        [GeneratedRegex(@"^E\s(.*)$", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
-        private static partial Regex EnabledNugetFeed();
-
-        public void Dispose()
-        {
-            emptyPackageDirectory.Dispose();
-        }
-    }
-}

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/NugetExeWrapper.cs

@@ -0,0 +1,304 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using Semmle.Util;
+
+namespace Semmle.Extraction.CSharp.DependencyFetching
+{
+    /// <summary>
+    /// Manage the downloading of NuGet packages with nuget.exe.
+    /// Locates packages in a source tree and downloads all of the
+    /// referenced assemblies to a temp folder.
+    /// </summary>
+    internal class NugetExeWrapper : IDisposable
+    {
+        private readonly string? nugetExe;
+        private readonly Semmle.Util.Logging.ILogger logger;
+
+        public int PackageCount => fileProvider.PackagesConfigs.Count;
+
+        private readonly string? backupNugetConfig;
+        private readonly string? nugetConfigPath;
+        private readonly FileProvider fileProvider;
+
+        /// <summary>
+        /// The packages directory.
+        /// This will be in the user-specified or computed Temp location
+        /// so as to not trample the source tree.
+        /// </summary>
+        private readonly DependencyDirectory packageDirectory;
+
+        /// <summary>
+        /// Create the package manager for a specified source tree.
+        /// </summary>
+        public NugetExeWrapper(FileProvider fileProvider, DependencyDirectory packageDirectory, Semmle.Util.Logging.ILogger logger, Func<bool> useDefaultFeed)
+        {
+            this.fileProvider = fileProvider;
+            this.packageDirectory = packageDirectory;
+            this.logger = logger;
+
+            if (fileProvider.PackagesConfigs.Count > 0)
+            {
+                logger.LogInfo($"Found packages.config files, trying to use nuget.exe for package restore");
+                nugetExe = ResolveNugetExe();
+                if (HasNoPackageSource() && useDefaultFeed())
+                {
+                    // We only modify or add a top level nuget.config file
+                    nugetConfigPath = Path.Combine(fileProvider.SourceDir.FullName, "nuget.config");
+                    try
+                    {
+                        if (File.Exists(nugetConfigPath))
+                        {
+                            var tempFolderPath = FileUtils.GetTemporaryWorkingDirectory(out _);
+
+                            do
+                            {
+                                backupNugetConfig = Path.Combine(tempFolderPath, Path.GetRandomFileName());
+                            }
+                            while (File.Exists(backupNugetConfig));
+                            File.Copy(nugetConfigPath, backupNugetConfig, true);
+                        }
+                        else
+                        {
+                            File.WriteAllText(nugetConfigPath,
+                                """
+                                <?xml version="1.0" encoding="utf-8"?>
+                                <configuration>
+                                  <packageSources>
+                                  </packageSources>
+                                </configuration>
+                                """);
+                        }
+                        AddDefaultPackageSource(nugetConfigPath);
+                    }
+                    catch (Exception e)
+                    {
+                        logger.LogError($"Failed to add default package source to {nugetConfigPath}: {e}");
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Tries to find the location of `nuget.exe`. It looks for
+        /// - the environment variable specifying a location,
+        /// - files in the repository,
+        /// - tries to resolve nuget from the PATH, or
+        /// - downloads it if it is not found.
+        /// </summary>
+        private string ResolveNugetExe()
+        {
+            var envVarPath = Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetExePath);
+            if (!string.IsNullOrEmpty(envVarPath))
+            {
+                logger.LogInfo($"Using nuget.exe from environment variable: '{envVarPath}'");
+                return envVarPath;
+            }
+
+            try
+            {
+                return DownloadNugetExe(fileProvider.SourceDir.FullName);
+            }
+            catch (Exception exc)
+            {
+                logger.LogInfo($"Download of nuget.exe failed: {exc.Message}");
+            }
+
+            var nugetExesInRepo = fileProvider.NugetExes;
+            if (nugetExesInRepo.Count > 1)
+            {
+                logger.LogInfo($"Found multiple nuget.exe files in the repository: {string.Join(", ", nugetExesInRepo.OrderBy(s => s))}");
+            }
+
+            if (nugetExesInRepo.Count > 0)
+            {
+                var path = nugetExesInRepo.First();
+                logger.LogInfo($"Using nuget.exe from path '{path}'");
+                return path;
+            }
+
+            var executableName = Win32.IsWindows() ? "nuget.exe" : "nuget";
+            var nugetPath = FileUtils.FindProgramOnPath(executableName);
+            if (nugetPath is not null)
+            {
+                nugetPath = Path.Combine(nugetPath, executableName);
+                logger.LogInfo($"Using nuget.exe from PATH: {nugetPath}");
+                return nugetPath;
+            }
+
+            throw new Exception("Could not find or download nuget.exe.");
+        }
+
+        private string DownloadNugetExe(string sourceDir)
+        {
+            var directory = Path.Combine(sourceDir, ".nuget");
+            var nuget = Path.Combine(directory, "nuget.exe");
+
+            // Nuget.exe already exists in the .nuget directory.
+            if (File.Exists(nuget))
+            {
+                logger.LogInfo($"Found nuget.exe at {nuget}");
+                return nuget;
+            }
+
+            Directory.CreateDirectory(directory);
+            logger.LogInfo("Attempting to download nuget.exe");
+            FileUtils.DownloadFile(FileUtils.NugetExeUrl, nuget, logger);
+            logger.LogInfo($"Downloaded nuget.exe to {nuget}");
+            return nuget;
+        }
+
+        private bool RunWithMono => !Win32.IsWindows() && !string.IsNullOrEmpty(Path.GetExtension(nugetExe));
+
+        /// <summary>
+        /// Restore all packages in the specified packages.config file.
+        /// </summary>
+        /// <param name="packagesConfig">The packages.config file.</param>
+        private bool TryRestoreNugetPackage(string packagesConfig)
+        {
+            logger.LogInfo($"Restoring file \"{packagesConfig}\"...");
+
+            /* Use nuget.exe to install a package.
+             * Note that there is a clutch of NuGet assemblies which could be used to
+             * invoke this directly, which would arguably be nicer. However they are
+             * really unwieldy and this solution works for now.
+             */
+
+            string exe, args;
+            if (RunWithMono)
+            {
+                exe = "mono";
+                args = $"\"{nugetExe}\" install -OutputDirectory \"{packageDirectory}\" \"{packagesConfig}\"";
+            }
+            else
+            {
+                exe = nugetExe!;
+                args = $"install -OutputDirectory \"{packageDirectory}\" \"{packagesConfig}\"";
+            }
+
+            var pi = new ProcessStartInfo(exe, args)
+            {
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false
+            };
+
+            var threadId = Environment.CurrentManagedThreadId;
+            void onOut(string s) => logger.LogDebug(s, threadId);
+            void onError(string s) => logger.LogError(s, threadId);
+            var exitCode = pi.ReadOutput(out _, onOut, onError);
+            if (exitCode != 0)
+            {
+                logger.LogError($"Command {pi.FileName} {pi.Arguments} failed with exit code {exitCode}");
+                return false;
+            }
+            else
+            {
+                logger.LogInfo($"Restored file \"{packagesConfig}\"");
+                return true;
+            }
+        }
+
+        /// <summary>
+        /// Download the packages to the temp folder.
+        /// </summary>
+        public int InstallPackages()
+        {
+            return fileProvider.PackagesConfigs.Count(TryRestoreNugetPackage);
+        }
+
+        private bool HasNoPackageSource()
+        {
+            if (Win32.IsWindows())
+            {
+                return false;
+            }
+
+            try
+            {
+                logger.LogInfo("Checking if default package source is available...");
+                RunMonoNugetCommand("sources list -ForceEnglishOutput", out var stdout);
+                if (stdout.All(line => line != "No sources found."))
+                {
+                    return false;
+                }
+
+                return true;
+            }
+            catch (Exception e)
+            {
+                logger.LogWarning($"Failed to check if default package source is added: {e}");
+                return false;
+            }
+        }
+
+        private void RunMonoNugetCommand(string command, out IList<string> stdout)
+        {
+            string exe, args;
+            if (RunWithMono)
+            {
+                exe = "mono";
+                args = $"\"{nugetExe}\" {command}";
+            }
+            else
+            {
+                exe = nugetExe!;
+                args = command;
+            }
+
+            var pi = new ProcessStartInfo(exe, args)
+            {
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false
+            };
+
+            var threadId = Environment.CurrentManagedThreadId;
+            void onOut(string s) => logger.LogDebug(s, threadId);
+            void onError(string s) => logger.LogError(s, threadId);
+            pi.ReadOutput(out stdout, onOut, onError);
+        }
+
+        private void AddDefaultPackageSource(string nugetConfig)
+        {
+            logger.LogInfo("Adding default package source...");
+            RunMonoNugetCommand($"sources add -Name DefaultNugetOrg -Source {NugetPackageRestorer.PublicNugetOrgFeed} -ConfigFile \"{nugetConfig}\"", out _);
+        }
+
+        public void Dispose()
+        {
+            if (nugetConfigPath is null)
+            {
+                return;
+            }
+
+            try
+            {
+                if (backupNugetConfig is null)
+                {
+                    logger.LogInfo("Removing nuget.config file");
+                    File.Delete(nugetConfigPath);
+                    return;
+                }
+
+                logger.LogInfo("Reverting nuget.config file content");
+                // The content of the original nuget.config file is reverted without changing the file's attributes or casing:
+                using (var backup = File.OpenRead(backupNugetConfig))
+                using (var current = File.OpenWrite(nugetConfigPath))
+                {
+                    current.SetLength(0);   // Truncate file
+                    backup.CopyTo(current); // Restore original content
+                }
+
+                logger.LogInfo("Deleting backup nuget.config file");
+                File.Delete(backupNugetConfig);
+            }
+            catch (Exception exc)
+            {
+                logger.LogError($"Failed to restore original nuget.config file: {exc}");
+            }
+        }
+    }
+}

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/NugetPackageRestorer.cs

@@ -4,6 +4,9 @@ using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.IO;
 using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
@@ -16,19 +19,24 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
 {
     internal sealed partial class NugetPackageRestorer : IDisposable
     {
+        internal const string PublicNugetOrgFeed = "https://api.nuget.org/v3/index.json";
+
         private readonly FileProvider fileProvider;
         private readonly FileContent fileContent;
         private readonly IDotNet dotnet;
+        private readonly DependabotProxy? dependabotProxy;
         private readonly IDiagnosticsWriter diagnosticsWriter;
         private readonly DependencyDirectory legacyPackageDirectory;
         private readonly DependencyDirectory missingPackageDirectory;
+        private readonly DependencyDirectory emptyPackageDirectory;
         private readonly ILogger logger;
         private readonly ICompilationInfoContainer compilationInfoContainer;
-        private readonly FeedManager feedManager;
+        private readonly bool checkNugetFeedResponsiveness = EnvironmentVariables.GetBooleanOptOut(EnvironmentVariableNames.CheckNugetFeedResponsiveness);
+        private readonly ImmutableHashSet<string> privateRegistryFeeds;
+        private readonly bool hasPrivateRegistryFeeds;
 
         public DependencyDirectory PackageDirectory { get; }
 
-
         public NugetPackageRestorer(
             FileProvider fileProvider,
             FileContent fileContent,
@@ -41,6 +49,9 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             this.fileProvider = fileProvider;
             this.fileContent = fileContent;
             this.dotnet = dotnet;
+            this.dependabotProxy = dependabotProxy;
+            this.privateRegistryFeeds = dependabotProxy?.RegistryURLs.ToImmutableHashSet() ?? [];
+            this.hasPrivateRegistryFeeds = privateRegistryFeeds.Count > 0;
             this.diagnosticsWriter = diagnosticsWriter;
             this.logger = logger;
             this.compilationInfoContainer = compilationInfoContainer;
@@ -48,7 +59,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             PackageDirectory = new DependencyDirectory("packages", "package", logger);
             legacyPackageDirectory = new DependencyDirectory("legacypackages", "legacy package", logger);
             missingPackageDirectory = new DependencyDirectory("missingpackages", "missing package", logger);
-            feedManager = new FeedManager(logger, dotnet, dependabotProxy, fileProvider);
+            emptyPackageDirectory = new DependencyDirectory("empty", "empty package", logger);
         }
 
         public string? TryRestore(string package)
@@ -107,22 +118,20 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         public HashSet<AssemblyLookupLocation> Restore()
         {
             var assemblyLookupLocations = new HashSet<AssemblyLookupLocation>();
-            logger.LogInfo($"Checking NuGet feed responsiveness: {feedManager.CheckNugetFeedResponsiveness}");
+            logger.LogInfo($"Checking NuGet feed responsiveness: {checkNugetFeedResponsiveness}");
-            compilationInfoContainer.CompilationInfos.Add(("NuGet feed responsiveness checked", feedManager.CheckNugetFeedResponsiveness ? "1" : "0"));
+            compilationInfoContainer.CompilationInfos.Add(("NuGet feed responsiveness checked", checkNugetFeedResponsiveness ? "1" : "0"));
 
             HashSet<string> explicitFeeds = [];
             HashSet<string> reachableFeeds = [];
 
             try
             {
-                EmitNugetConfigDiagnostics();
-
                 // Find feeds that are configured in NuGet.config files and divide them into ones that
                 // are explicitly configured for the project or by a private registry, and "all feeds"
                 // (including inherited ones) from other locations on the host outside of the working directory.
-                (explicitFeeds, var allFeeds) = feedManager.GetAllFeeds();
+                (explicitFeeds, var allFeeds) = GetAllFeeds();
 
-                if (feedManager.CheckNugetFeedResponsiveness)
+                if (checkNugetFeedResponsiveness)
                 {
                     var inheritedFeeds = allFeeds.Except(explicitFeeds).ToHashSet();
 
@@ -131,7 +140,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                         compilationInfoContainer.CompilationInfos.Add(("Inherited NuGet feed count", inheritedFeeds.Count.ToString()));
                     }
 
-                    var timeout = feedManager.CheckSpecifiedFeeds(explicitFeeds, out var reachableExplicitFeeds);
+                    var timeout = CheckSpecifiedFeeds(explicitFeeds, out var reachableExplicitFeeds);
                     reachableFeeds.UnionWith(reachableExplicitFeeds);
 
                     var allExplicitReachable = explicitFeeds.Count == reachableExplicitFeeds.Count;
@@ -148,17 +157,17 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                     }
 
                     // Inherited feeds should only be used, if they are indeed reachable (as they may be environment specific).
-                    feedManager.CheckSpecifiedFeeds(inheritedFeeds, out var reachableInheritedFeeds);
+                    CheckSpecifiedFeeds(inheritedFeeds, out var reachableInheritedFeeds);
                     reachableFeeds.UnionWith(reachableInheritedFeeds);
                 }
 
-                using (var packagesConfigRestore = PackagesConfigRestoreFactory.Create(fileProvider, legacyPackageDirectory, logger, feedManager.IsDefaultFeedReachable))
+                using (var nuget = new NugetExeWrapper(fileProvider, legacyPackageDirectory, logger, IsDefaultFeedReachable))
                 {
-                    var count = packagesConfigRestore.InstallPackages();
+                    var count = nuget.InstallPackages();
 
-                    if (packagesConfigRestore.PackageCount > 0)
+                    if (nuget.PackageCount > 0)
                     {
-                        compilationInfoContainer.CompilationInfos.Add(("packages.config files", packagesConfigRestore.PackageCount.ToString()));
+                        compilationInfoContainer.CompilationInfos.Add(("packages.config files", nuget.PackageCount.ToString()));
                         compilationInfoContainer.CompilationInfos.Add(("Successfully restored packages.config files", count.ToString()));
                     }
                 }
@@ -200,13 +209,13 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
 
             var paths = dependencies
                 .Paths
-                .Select(d => Path.Join(PackageDirectory.DirInfo.FullName, d))
+                .Select(d => Path.Combine(PackageDirectory.DirInfo.FullName, d))
                 .ToList();
             assemblyLookupLocations.UnionWith(paths.Select(p => new AssemblyLookupLocation(p)));
 
             var usedPackageNames = GetAllUsedPackageDirNames(dependencies);
 
-            var missingPackageLocation = feedManager.CheckNugetFeedResponsiveness
+            var missingPackageLocation = checkNugetFeedResponsiveness
                 ? DownloadMissingPackagesFromSpecificFeeds(usedPackageNames, explicitFeeds)
                 : DownloadMissingPackages(usedPackageNames);
 
@@ -217,6 +226,79 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             return assemblyLookupLocations;
         }
 
+        /// <summary>
+        /// Tests which of the feeds given by <paramref name="feedsToCheck"/> are reachable.
+        /// </summary>
+        /// <param name="feedsToCheck">The feeds to check.</param>
+        /// <param name="isFallback">Whether the feeds are fallback feeds or not.</param>
+        /// <param name="isTimeout">Whether a timeout occurred while checking the feeds.</param>
+        /// <returns>The list of feeds that could be reached.</returns>
+        private List<string> GetReachableNuGetFeeds(HashSet<string> feedsToCheck, bool isFallback, out bool isTimeout)
+        {
+            var fallbackStr = isFallback ? "fallback " : "";
+            logger.LogInfo($"Checking {fallbackStr}NuGet feed reachability on feeds: {string.Join(", ", feedsToCheck.OrderBy(f => f))}");
+
+            var (initialTimeout, tryCount) = GetFeedRequestSettings(isFallback);
+            var timeout = false;
+            var reachableFeeds = feedsToCheck
+                .Where(feed =>
+                {
+                    var reachable = IsFeedReachable(feed, initialTimeout, tryCount, out var feedTimeout);
+                    timeout |= feedTimeout;
+                    return reachable;
+                })
+                .ToList();
+
+            if (reachableFeeds.Count == 0)
+            {
+                logger.LogWarning($"No {fallbackStr}NuGet feeds are reachable.");
+            }
+            else
+            {
+                logger.LogInfo($"Reachable {fallbackStr}NuGet feeds: {string.Join(", ", reachableFeeds.OrderBy(f => f))}");
+            }
+
+            isTimeout = timeout;
+            return reachableFeeds;
+        }
+
+        private bool IsDefaultFeedReachable()
+        {
+            if (checkNugetFeedResponsiveness)
+            {
+                var (initialTimeout, tryCount) = GetFeedRequestSettings(isFallback: false);
+                return IsFeedReachable(PublicNugetOrgFeed, initialTimeout, tryCount, out var _);
+            }
+
+            return true;
+        }
+
+        private List<string> GetReachableFallbackNugetFeeds(HashSet<string>? feedsFromNugetConfigs)
+        {
+            var fallbackFeeds = EnvironmentVariables.GetURLs(EnvironmentVariableNames.FallbackNugetFeeds).ToHashSet();
+            if (fallbackFeeds.Count == 0)
+            {
+                fallbackFeeds.Add(PublicNugetOrgFeed);
+                logger.LogInfo($"No fallback NuGet feeds specified. Adding default feed: {PublicNugetOrgFeed}");
+
+                var shouldAddNugetConfigFeeds = EnvironmentVariables.GetBooleanOptOut(EnvironmentVariableNames.AddNugetConfigFeedsToFallback);
+                logger.LogInfo($"Adding feeds from nuget.config to fallback restore: {shouldAddNugetConfigFeeds}");
+
+                if (shouldAddNugetConfigFeeds && feedsFromNugetConfigs?.Count > 0)
+                {
+                    // There are some feeds in `feedsFromNugetConfigs` that have already been checked for reachability, we could skip those.
+                    // But we might use different responsiveness testing settings when we try them in the fallback logic, so checking them again is safer.
+                    fallbackFeeds.UnionWith(feedsFromNugetConfigs);
+                    logger.LogInfo($"Using NuGet feeds from nuget.config files as fallback feeds: {string.Join(", ", feedsFromNugetConfigs.OrderBy(f => f))}");
+                }
+            }
+
+            var reachableFallbackFeeds = GetReachableNuGetFeeds(fallbackFeeds, isFallback: true, out var _);
+
+            compilationInfoContainer.CompilationInfos.Add(("Reachable fallback NuGet feed count", reachableFallbackFeeds.Count.ToString()));
+
+            return reachableFallbackFeeds;
+        }
 
         /// <summary>
         /// Executes `dotnet restore` on all solution files in solutions.
@@ -239,7 +321,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             var projects = fileProvider.Solutions.SelectMany(solution =>
                 {
                     logger.LogInfo($"Restoring solution {solution}...");
-                    var nugetSources = feedManager.MakeRestoreSourcesArgument(solution, reachableFeeds);
+                    var nugetSources = MakeRestoreSourcesArgument(solution, reachableFeeds);
                     var res = dotnet.Restore(new(solution, PackageDirectory.DirInfo.FullName, ForceDotnetRefAssemblyFetching: true, NugetSources: nugetSources, TargetWindows: isWindows));
                     if (res.Success)
                     {
@@ -264,6 +346,57 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             return projects;
         }
 
+        private string FeedsToRestoreArgument(IEnumerable<string> feeds)
+        {
+            // If there are no feeds, we want to override any default feeds that `dotnet restore` would use by passing a dummy source argument.
+            if (!feeds.Any())
+            {
+                return $" -s \"{emptyPackageDirectory.DirInfo.FullName}\"";
+            }
+
+            // Add package sources. If any are present, they override all sources specified in
+            // the configuration file(s).
+            var feedArgs = new StringBuilder();
+            foreach (var feed in feeds)
+            {
+                feedArgs.Append($" -s \"{feed}\"");
+            }
+
+            return feedArgs.ToString();
+        }
+
+        /// <summary>
+        /// Constructs the list of NuGet sources to use for this restore.
+        /// (1) Use the feeds we get from `dotnet nuget list source`
+        /// (2) Use private registries, if they are configured
+        /// </summary>
+        /// <param name="path">Path to project/solution</param>
+        /// <param name="reachableFeeds">The set of reachable NuGet feeds.</param>
+        /// <returns>A string representing the NuGet sources argument for the restore command.</returns>
+        private string? MakeRestoreSourcesArgument(string path, HashSet<string> reachableFeeds)
+        {
+            // Do not construct an set of explicit NuGet sources to use for restore.
+            if (!checkNugetFeedResponsiveness && !hasPrivateRegistryFeeds)
+            {
+                return null;
+            }
+
+            // Find the path specific feeds.
+            var folder = GetDirectoryName(path);
+            var feedsToConsider = folder is not null ? GetFeeds(() => dotnet.GetNugetFeedsFromFolder(folder)).ToHashSet() : [];
+
+            if (hasPrivateRegistryFeeds)
+            {
+                feedsToConsider.UnionWith(privateRegistryFeeds);
+            }
+
+            var feedsToUse = checkNugetFeedResponsiveness
+                ? feedsToConsider.Where(reachableFeeds.Contains)
+                : feedsToConsider;
+
+            return FeedsToRestoreArgument(feedsToUse);
+        }
+
         /// <summary>
         /// Executes `dotnet restore` on all projects in projects.
         /// This is done in parallel for performance reasons.
@@ -288,7 +421,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 foreach (var project in projectGroup)
                 {
                     logger.LogInfo($"Restoring project {project}...");
-                    var nugetSources = feedManager.MakeRestoreSourcesArgument(project, reachableFeeds);
+                    var nugetSources = MakeRestoreSourcesArgument(project, reachableFeeds);
                     var res = dotnet.Restore(new(project, PackageDirectory.DirInfo.FullName, ForceDotnetRefAssemblyFetching: true, NugetSources: nugetSources, TargetWindows: isWindows));
                     assets.AddDependenciesRange(res.AssetsFilePaths);
                     lock (sync)
@@ -317,9 +450,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
 
         private AssemblyLookupLocation? DownloadMissingPackagesFromSpecificFeeds(IEnumerable<string> usedPackageNames, HashSet<string>? feedsFromNugetConfigs)
         {
-            var reachableFallbackFeeds = feedManager.GetReachableFallbackNugetFeeds(feedsFromNugetConfigs);
+            var reachableFallbackFeeds = GetReachableFallbackNugetFeeds(feedsFromNugetConfigs);
-            compilationInfoContainer.CompilationInfos.Add(("Reachable fallback NuGet feed count", reachableFallbackFeeds.Count.ToString()));
-
             if (reachableFallbackFeeds.Count > 0)
             {
                 return DownloadMissingPackages(usedPackageNames, fallbackNugetFeeds: reachableFallbackFeeds);
@@ -396,7 +527,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             var sb = new StringBuilder();
             fallbackNugetFeeds.ForEach((feed, index) => sb.AppendLine($"<add key=\"feed{index}\" value=\"{feed}\" />"));
 
-            var nugetConfigPath = Path.Join(folderPath, "nuget.config");
+            var nugetConfigPath = Path.Combine(folderPath, "nuget.config");
             logger.LogInfo($"Creating fallback nuget.config file {nugetConfigPath}.");
             File.WriteAllText(nugetConfigPath,
                 $"""
@@ -605,6 +736,147 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             }
         }
 
+        private static async Task<HttpResponseMessage> ExecuteGetRequest(string address, HttpClient httpClient, CancellationToken cancellationToken)
+        {
+            return await httpClient.GetAsync(address, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+        }
+
+        private bool IsFeedReachable(string feed, int timeoutMilliSeconds, int tryCount, out bool isTimeout)
+        {
+            logger.LogInfo($"Checking if NuGet feed '{feed}' is reachable...");
+
+            // Configure the HttpClient to be aware of the Dependabot Proxy, if used.
+            HttpClientHandler httpClientHandler = new();
+            if (dependabotProxy != null)
+            {
+                httpClientHandler.Proxy = new WebProxy(dependabotProxy.Address);
+
+                if (dependabotProxy.Certificate != null)
+                {
+                    httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, _) =>
+                    {
+                        if (chain is null || cert is null)
+                        {
+                            var msg = cert is null && chain is null
+                                ? "certificate and chain"
+                                : chain is null
+                                    ? "chain"
+                                    : "certificate";
+                            logger.LogWarning($"Dependabot proxy certificate validation failed due to missing {msg}");
+                            return false;
+                        }
+                        chain.ChainPolicy.TrustMode = X509ChainTrustMode.CustomRootTrust;
+                        chain.ChainPolicy.CustomTrustStore.Add(dependabotProxy.Certificate);
+                        return chain.Build(cert);
+                    };
+                }
+            }
+
+            using HttpClient client = new(httpClientHandler);
+
+            isTimeout = false;
+
+            for (var i = 0; i < tryCount; i++)
+            {
+                using var cts = new CancellationTokenSource();
+                cts.CancelAfter(timeoutMilliSeconds);
+                try
+                {
+                    logger.LogInfo($"Attempt {i + 1}/{tryCount} to reach NuGet feed '{feed}'.");
+                    using var response = ExecuteGetRequest(feed, client, cts.Token).GetAwaiter().GetResult();
+                    response.EnsureSuccessStatusCode();
+                    logger.LogInfo($"Querying NuGet feed '{feed}' succeeded.");
+                    return true;
+                }
+                catch (Exception exc)
+                {
+                    if (exc is TaskCanceledException tce &&
+                        tce.CancellationToken == cts.Token &&
+                        cts.Token.IsCancellationRequested)
+                    {
+                        logger.LogInfo($"Didn't receive answer from NuGet feed '{feed}' in {timeoutMilliSeconds}ms.");
+                        timeoutMilliSeconds *= 2;
+                        continue;
+                    }
+
+                    logger.LogInfo($"Querying NuGet feed '{feed}' failed. The reason for the failure: {exc.Message}");
+                    return false;
+                }
+            }
+
+            logger.LogWarning($"Didn't receive answer from NuGet feed '{feed}'. Tried it {tryCount} times.");
+            isTimeout = true;
+            return false;
+        }
+
+        private (int initialTimeout, int tryCount) GetFeedRequestSettings(bool isFallback)
+        {
+            int timeoutMilliSeconds = isFallback && int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessInitialTimeoutForFallback), out timeoutMilliSeconds)
+                ? timeoutMilliSeconds
+                : int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessInitialTimeout), out timeoutMilliSeconds)
+                    ? timeoutMilliSeconds
+                    : 1000;
+            logger.LogDebug($"Initial timeout for NuGet feed reachability check is {timeoutMilliSeconds}ms.");
+
+            int tryCount = isFallback && int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessRequestCountForFallback), out tryCount)
+                ? tryCount
+                : int.TryParse(Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetFeedResponsivenessRequestCount), out tryCount)
+                    ? tryCount
+                    : 4;
+            logger.LogDebug($"Number of tries for NuGet feed reachability check is {tryCount}.");
+
+            return (timeoutMilliSeconds, tryCount);
+        }
+
+        /// <summary>
+        /// Retrieves a list of excluded NuGet feeds from the corresponding environment variable.
+        /// </summary>
+        private HashSet<string> GetExcludedFeeds()
+        {
+            var excludedFeeds = EnvironmentVariables.GetURLs(EnvironmentVariableNames.ExcludedNugetFeedsFromResponsivenessCheck)
+                .ToHashSet();
+
+            if (excludedFeeds.Count > 0)
+            {
+                logger.LogInfo($"Excluded NuGet feeds from responsiveness check: {string.Join(", ", excludedFeeds.OrderBy(f => f))}");
+            }
+
+            return excludedFeeds;
+        }
+
+        /// <summary>
+        /// Checks that we can connect to the specified NuGet feeds.
+        /// </summary>
+        /// <param name="feeds">The set of package feeds to check.</param>
+        /// <param name="reachableFeeds">The list of feeds that were reachable.</param>
+        /// <returns>
+        /// True if there is a timeout when trying to reach the feeds (excluding any feeds that are configured
+        /// to be excluded from the check) or false otherwise.
+        /// </returns>
+        private bool CheckSpecifiedFeeds(HashSet<string> feeds, out HashSet<string> reachableFeeds)
+        {
+            // Exclude any feeds from the feed check that are configured by the corresponding environment variable.
+            // These feeds are always assumed to be reachable.
+            var excludedFeeds = GetExcludedFeeds();
+
+            HashSet<string> feedsToCheck = feeds.Where(feed =>
+            {
+                if (excludedFeeds.Contains(feed))
+                {
+                    logger.LogInfo($"Not checking reachability of NuGet feed '{feed}' as it is in the list of excluded feeds.");
+                    return false;
+                }
+                return true;
+            }).ToHashSet();
+
+            reachableFeeds = GetReachableNuGetFeeds(feedsToCheck, isFallback: false, out var isTimeout).ToHashSet();
+
+            // Always consider feeds excluded for the reachability check as reachable.
+            reachableFeeds.UnionWith(feeds.Where(feed => excludedFeeds.Contains(feed)));
+
+            return isTimeout;
+        }
+
         /// <summary>
         /// If <paramref name="allFeedsReachable"/> is `false`, logs this and emits a diagnostic.
         /// Adds a `CompilationInfos` entry either way.
@@ -627,15 +899,56 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             compilationInfoContainer.CompilationInfos.Add(("All NuGet feeds reachable", allFeedsReachable ? "1" : "0"));
         }
 
-        private void EmitNugetConfigDiagnostics()
+        private IEnumerable<string> GetFeeds(Func<IList<string>> getNugetFeeds)
         {
+            var results = getNugetFeeds();
+            var regex = EnabledNugetFeed();
+            foreach (var result in results)
+            {
+                var match = regex.Match(result);
+                if (!match.Success)
+                {
+                    logger.LogError($"Failed to parse feed from '{result}'");
+                    continue;
+                }
+
+                var url = match.Groups[1].Value;
+                if (!url.StartsWith("https://", StringComparison.InvariantCultureIgnoreCase) &&
+                    !url.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
+                {
+                    logger.LogInfo($"Skipping feed '{url}' as it is not a valid URL.");
+                    continue;
+                }
+
+                if (!string.IsNullOrWhiteSpace(url))
+                {
+                    yield return url;
+                }
+            }
+        }
+
+        private string? GetDirectoryName(string path)
+        {
+            try
+            {
+                return new FileInfo(path).Directory?.FullName;
+            }
+            catch (Exception exc)
+            {
+                logger.LogWarning($"Failed to get directory of '{path}': {exc}");
+            }
+            return null;
+        }
+
+        private (HashSet<string> explicitFeeds, HashSet<string> allFeeds) GetAllFeeds()
+        {
+            var nugetConfigs = fileProvider.NugetConfigs;
+
             // On systems with case-sensitive file systems (for simplicity, we assume that is Linux), the
             // filenames of NuGet configuration files must be named correctly. For compatibility with projects
             // that are typically built on Windows or macOS where this doesn't matter, we accept all variants
             // of `nuget.config` ourselves. However, `dotnet` does not. If we detect that incorrectly-named
             // files are present, we emit a diagnostic to warn the user.
-            var nugetConfigs = fileProvider.NugetConfigs;
-
             if (SystemBuildActions.Instance.IsLinux())
             {
                 string[] acceptedNugetConfigNames = ["nuget.config", "NuGet.config", "NuGet.Config"];
@@ -665,6 +978,53 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                     ));
                 }
             }
+
+            // Find feeds that are explicitly configured in the NuGet configuration files that we found.
+            var explicitFeeds = nugetConfigs
+                .SelectMany(config => GetFeeds(() => dotnet.GetNugetFeeds(config)))
+                .ToHashSet();
+
+            if (explicitFeeds.Count > 0)
+            {
+                logger.LogInfo($"Found {explicitFeeds.Count} NuGet feeds in nuget.config files: {string.Join(", ", explicitFeeds.OrderBy(f => f))}");
+            }
+            else
+            {
+                logger.LogDebug("No NuGet feeds found in nuget.config files.");
+            }
+
+            // If private package registries are configured for C#, then consider those
+            // in addition to the ones that are configured in `nuget.config` files.
+            if (hasPrivateRegistryFeeds)
+            {
+                logger.LogInfo($"Found {privateRegistryFeeds.Count} private registry feeds configured for C#: {string.Join(", ", privateRegistryFeeds.OrderBy(f => f))}");
+                explicitFeeds.UnionWith(privateRegistryFeeds);
+            }
+
+            HashSet<string> allFeeds = [];
+
+            // Add all explicitFeeds to the set of all feeds.
+            allFeeds.UnionWith(explicitFeeds);
+
+            // Obtain the list of feeds from the root source directory.
+            // If a NuGet file is present it will be respected, otherwise we will just get the machine/environment specific feeds.
+            var nugetFeedsFromRoot = GetFeeds(() => dotnet.GetNugetFeedsFromFolder(fileProvider.SourceDir.FullName));
+            allFeeds.UnionWith(nugetFeedsFromRoot);
+
+            if (nugetConfigs.Count > 0)
+            {
+                var nugetConfigFeeds = nugetConfigs
+                    .Select(GetDirectoryName)
+                    .Where(folder => folder != null)
+                    .SelectMany(folder => GetFeeds(() => dotnet.GetNugetFeedsFromFolder(folder!)))
+                    .ToHashSet();
+
+                allFeeds.UnionWith(nugetConfigFeeds);
+            }
+
+            logger.LogInfo($"Found {allFeeds.Count} NuGet feeds (with inherited ones) in nuget.config files: {string.Join(", ", allFeeds.OrderBy(f => f))}");
+
+            return (explicitFeeds, allFeeds);
         }
 
         [GeneratedRegex(@"<TargetFramework>.*</TargetFramework>", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
@@ -676,12 +1036,15 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         [GeneratedRegex(@"^(.+)\.(\d+\.\d+\.\d+(-(.+))?)$", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
         private static partial Regex LegacyNugetPackage();
 
+        [GeneratedRegex(@"^E\s(.*)$", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
+        private static partial Regex EnabledNugetFeed();
+
         public void Dispose()
         {
             PackageDirectory?.Dispose();
             legacyPackageDirectory?.Dispose();
             missingPackageDirectory?.Dispose();
-            feedManager.Dispose();
+            emptyPackageDirectory?.Dispose();
         }
 
         /// <summary>
@@ -689,7 +1052,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         /// </summary>
         private static string ComputeTempDirectoryPath(string subfolderName)
         {
-            return Path.Join(FileUtils.GetTemporaryWorkingDirectory(out _), subfolderName);
+            return Path.Combine(FileUtils.GetTemporaryWorkingDirectory(out _), subfolderName);
         }
 
         /// <summary>
@@ -697,7 +1060,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         /// </summary>
         private static string ComputeTempDirectoryPath(string srcDir, string subfolderName)
         {
-            return Path.Join(FileUtils.GetTemporaryWorkingDirectory(out _), FileUtils.ComputeHash(srcDir), subfolderName);
+            return Path.Combine(FileUtils.GetTemporaryWorkingDirectory(out _), FileUtils.ComputeHash(srcDir), subfolderName);
         }
     }
 }

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/PackagesConfigRestorer.cs

@@ -1,368 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using Semmle.Util;
-
-namespace Semmle.Extraction.CSharp.DependencyFetching
-{
-    internal interface IPackagesConfigRestore : IDisposable
-    {
-        /// <summary>
-        /// The number of packages.config files found in the source tree.
-        /// </summary>
-        int PackageCount { get; }
-
-        /// <summary>
-        /// Download the packages to the temp folder.
-        /// </summary>
-        int InstallPackages();
-    }
-
-    /// <summary>
-    /// Factory for creating a package manager to restore NuGet packages referenced in packages.config files.
-    /// If the environment doesn't support using nuget.exe to restore packages from packages.config files, a no-op implementation is returned.
-    /// It is worth noting that for macOS and Linux, nuget.exe is used with mono. However, mono is being deprecated and the last GitHub images
-    /// to contain mono are:
-    /// - Ubuntu 22.04
-    /// - macOS 14
-    ///
-    /// If the packages from the packages.config files are not restored with the packages.config restore functionality below, there is a subsequent
-    /// step that still may succeed in restoring the packages without the help of nuget.exe (by attempting to restore using dotnet).
-    /// </summary>
-    internal class PackagesConfigRestoreFactory
-    {
-        public static IPackagesConfigRestore Create(FileProvider fileProvider, DependencyDirectory packageDirectory, Semmle.Util.Logging.ILogger logger, Func<bool> useDefaultFeed)
-        {
-            if (SystemBuildActions.Instance.IsWindows() || SystemBuildActions.Instance.IsMonoInstalled())
-            {
-                return new NugetExeWrapper(fileProvider, packageDirectory, logger, useDefaultFeed);
-            }
-
-            return new NoOpPackagesConfig(fileProvider.PackagesConfigs, logger);
-        }
-
-        /// <summary>
-        /// Manage the downloading of NuGet packages with nuget.exe.
-        /// Locates packages in a source tree and downloads all of the
-        /// referenced assemblies to a temp folder.
-        /// </summary>
-        private class NugetExeWrapper : IPackagesConfigRestore
-        {
-            private readonly string? nugetExe;
-            private readonly Semmle.Util.Logging.ILogger logger;
-
-            public int PackageCount => fileProvider.PackagesConfigs.Count;
-
-            private readonly string? backupNugetConfig;
-            private readonly string? nugetConfigPath;
-            private readonly FileProvider fileProvider;
-
-            /// <summary>
-            /// The packages directory.
-            /// This will be in the user-specified or computed Temp location
-            /// so as to not trample the source tree.
-            /// </summary>
-            private readonly DependencyDirectory packageDirectory;
-
-            private bool IsWindows => SystemBuildActions.Instance.IsWindows();
-
-            /// <summary>
-            /// Create the package manager for a specified source tree.
-            /// </summary>
-            public NugetExeWrapper(FileProvider fileProvider, DependencyDirectory packageDirectory, Semmle.Util.Logging.ILogger logger, Func<bool> useDefaultFeed)
-            {
-                this.fileProvider = fileProvider;
-                this.packageDirectory = packageDirectory;
-                this.logger = logger;
-
-                if (fileProvider.PackagesConfigs.Count > 0)
-                {
-                    logger.LogInfo($"Found packages.config files, trying to use nuget.exe for package restore");
-                    nugetExe = ResolveNugetExe();
-                    if (!HasPackageSource() && useDefaultFeed())
-                    {
-                        // We only modify or add a top level nuget.config file
-                        nugetConfigPath = Path.Join(fileProvider.SourceDir.FullName, "nuget.config");
-                        try
-                        {
-                            if (File.Exists(nugetConfigPath))
-                            {
-                                var tempFolderPath = FileUtils.GetTemporaryWorkingDirectory(out _);
-
-                                do
-                                {
-                                    backupNugetConfig = Path.Join(tempFolderPath, Path.GetRandomFileName());
-                                }
-                                while (File.Exists(backupNugetConfig));
-                                File.Copy(nugetConfigPath, backupNugetConfig, true);
-                            }
-                            else
-                            {
-                                File.WriteAllText(nugetConfigPath,
-                                    """
-                                <?xml version="1.0" encoding="utf-8"?>
-                                <configuration>
-                                  <packageSources>
-                                  </packageSources>
-                                </configuration>
-                                """);
-                            }
-                            AddDefaultPackageSource(nugetConfigPath);
-                        }
-                        catch (Exception e)
-                        {
-                            logger.LogError($"Failed to add default package source to {nugetConfigPath}: {e}");
-                        }
-                    }
-                }
-            }
-
-            /// <summary>
-            /// Tries to find the location of `nuget.exe`. It looks for
-            /// - the environment variable specifying a location,
-            /// - files in the repository,
-            /// - tries to resolve nuget from the PATH, or
-            /// - downloads it if it is not found.
-            /// </summary>
-            private string ResolveNugetExe()
-            {
-                var envVarPath = Environment.GetEnvironmentVariable(EnvironmentVariableNames.NugetExePath);
-                if (!string.IsNullOrEmpty(envVarPath))
-                {
-                    logger.LogInfo($"Using nuget.exe from environment variable: '{envVarPath}'");
-                    return envVarPath;
-                }
-
-                try
-                {
-                    return DownloadNugetExe(fileProvider.SourceDir.FullName);
-                }
-                catch (Exception exc)
-                {
-                    logger.LogInfo($"Download of nuget.exe failed: {exc.Message}");
-                }
-
-                var nugetExesInRepo = fileProvider.NugetExes;
-                if (nugetExesInRepo.Count > 1)
-                {
-                    logger.LogInfo($"Found multiple nuget.exe files in the repository: {string.Join(", ", nugetExesInRepo.OrderBy(s => s))}");
-                }
-
-                if (nugetExesInRepo.Count > 0)
-                {
-                    var path = nugetExesInRepo.First();
-                    logger.LogInfo($"Using nuget.exe from path '{path}'");
-                    return path;
-                }
-
-                var executableName = IsWindows ? "nuget.exe" : "nuget";
-                var nugetPath = FileUtils.FindProgramOnPath(executableName);
-                if (nugetPath is not null)
-                {
-                    nugetPath = Path.Join(nugetPath, executableName);
-                    logger.LogInfo($"Using nuget.exe from PATH: {nugetPath}");
-                    return nugetPath;
-                }
-
-                throw new Exception("Could not find or download nuget.exe.");
-            }
-
-            private string DownloadNugetExe(string sourceDir)
-            {
-                var directory = Path.Join(sourceDir, ".nuget");
-                var nuget = Path.Join(directory, "nuget.exe");
-
-                // Nuget.exe already exists in the .nuget directory.
-                if (File.Exists(nuget))
-                {
-                    logger.LogInfo($"Found nuget.exe at {nuget}");
-                    return nuget;
-                }
-
-                Directory.CreateDirectory(directory);
-                logger.LogInfo("Attempting to download nuget.exe");
-                FileUtils.DownloadFile(FileUtils.NugetExeUrl, nuget, logger);
-                logger.LogInfo($"Downloaded nuget.exe to {nuget}");
-                return nuget;
-            }
-
-            private bool RunWithMono => !IsWindows && !string.IsNullOrEmpty(Path.GetExtension(nugetExe));
-
-            /// <summary>
-            /// Restore all packages in the specified packages.config file.
-            /// </summary>
-            /// <param name="packagesConfig">The packages.config file.</param>
-            private bool TryRestoreNugetPackage(string packagesConfig)
-            {
-                logger.LogInfo($"Restoring file \"{packagesConfig}\"...");
-
-                /* Use nuget.exe to install a package.
-                 * Note that there is a clutch of NuGet assemblies which could be used to
-                 * invoke this directly, which would arguably be nicer. However they are
-                 * really unwieldy and this solution works for now.
-                 */
-
-                string exe, args;
-                if (RunWithMono)
-                {
-                    exe = "mono";
-                    args = $"\"{nugetExe}\" install -OutputDirectory \"{packageDirectory}\" \"{packagesConfig}\"";
-                }
-                else
-                {
-                    exe = nugetExe!;
-                    args = $"install -OutputDirectory \"{packageDirectory}\" \"{packagesConfig}\"";
-                }
-
-                var pi = new ProcessStartInfo(exe, args)
-                {
-                    RedirectStandardOutput = true,
-                    RedirectStandardError = true,
-                    UseShellExecute = false
-                };
-
-                var threadId = Environment.CurrentManagedThreadId;
-                void onOut(string s) => logger.LogDebug(s, threadId);
-                void onError(string s) => logger.LogError(s, threadId);
-                var exitCode = pi.ReadOutput(out _, onOut, onError);
-                if (exitCode != 0)
-                {
-                    logger.LogError($"Command {pi.FileName} {pi.Arguments} failed with exit code {exitCode}");
-                    return false;
-                }
-                else
-                {
-                    logger.LogInfo($"Restored file \"{packagesConfig}\"");
-                    return true;
-                }
-            }
-
-            /// <summary>
-            /// Download the packages to the temp folder.
-            /// </summary>
-            public int InstallPackages()
-            {
-                return fileProvider.PackagesConfigs.Count(TryRestoreNugetPackage);
-            }
-
-            private bool HasPackageSource()
-            {
-                if (IsWindows)
-                {
-                    return true;
-                }
-
-                try
-                {
-                    logger.LogInfo("Checking if default package source is available...");
-                    RunMonoNugetCommand("sources list -ForceEnglishOutput", out var stdout);
-                    if (stdout.All(line => line != "No sources found."))
-                    {
-                        return true;
-                    }
-
-                    return false;
-                }
-                catch (Exception e)
-                {
-                    logger.LogWarning($"Failed to check if default package source is added: {e}");
-                    return true;
-                }
-            }
-
-            private void RunMonoNugetCommand(string command, out IList<string> stdout)
-            {
-                string exe, args;
-                if (RunWithMono)
-                {
-                    exe = "mono";
-                    args = $"\"{nugetExe}\" {command}";
-                }
-                else
-                {
-                    exe = nugetExe!;
-                    args = command;
-                }
-
-                var pi = new ProcessStartInfo(exe, args)
-                {
-                    RedirectStandardOutput = true,
-                    RedirectStandardError = true,
-                    UseShellExecute = false
-                };
-
-                var threadId = Environment.CurrentManagedThreadId;
-                void onOut(string s) => logger.LogDebug(s, threadId);
-                void onError(string s) => logger.LogError(s, threadId);
-                pi.ReadOutput(out stdout, onOut, onError);
-            }
-
-            private void AddDefaultPackageSource(string nugetConfig)
-            {
-                logger.LogInfo("Adding default package source...");
-                RunMonoNugetCommand($"sources add -Name DefaultNugetOrg -Source {FeedManager.PublicNugetOrgFeed} -ConfigFile \"{nugetConfig}\"", out _);
-            }
-
-            public void Dispose()
-            {
-                if (nugetConfigPath is null)
-                {
-                    return;
-                }
-
-                try
-                {
-                    if (backupNugetConfig is null)
-                    {
-                        logger.LogInfo("Removing nuget.config file");
-                        File.Delete(nugetConfigPath);
-                        return;
-                    }
-
-                    logger.LogInfo("Reverting nuget.config file content");
-                    // The content of the original nuget.config file is reverted without changing the file's attributes or casing:
-                    using (var backup = File.OpenRead(backupNugetConfig))
-                    using (var current = File.OpenWrite(nugetConfigPath))
-                    {
-                        current.SetLength(0);   // Truncate file
-                        backup.CopyTo(current); // Restore original content
-                    }
-
-                    logger.LogInfo("Deleting backup nuget.config file");
-                    File.Delete(backupNugetConfig);
-                }
-                catch (Exception exc)
-                {
-                    logger.LogError($"Failed to restore original nuget.config file: {exc}");
-                }
-            }
-        }
-
-        private class NoOpPackagesConfig : IPackagesConfigRestore
-        {
-            private readonly Semmle.Util.Logging.ILogger logger;
-            private readonly ICollection<string> packagesConfigs;
-
-            public NoOpPackagesConfig(ICollection<string> packagesConfigs, Semmle.Util.Logging.ILogger logger)
-            {
-                this.packagesConfigs = packagesConfigs;
-                this.logger = logger;
-            }
-
-            public int PackageCount => packagesConfigs.Count;
-
-            public int InstallPackages()
-            {
-                if (PackageCount > 0)
-                {
-                    logger.LogInfo("Found packages.config files, but nuget.exe cannot be used to restore packages on this platform. Skipping restore of packages.config files.");
-                }
-                return 0;
-            }
-
-            public void Dispose() { }
-        }
-    }
-}

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/Runtime.cs

@@ -79,7 +79,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
 
                 var monoPath = FileUtils.FindProgramOnPath(Win32.IsWindows() ? "mono.exe" : "mono");
                 string[] monoDirs = monoPath is not null
-                    ? [Path.GetFullPath(Path.Join(monoPath, "..", "lib", "mono")), monoPath]
+                    ? [Path.GetFullPath(Path.Combine(monoPath, "..", "lib", "mono")), monoPath]
                     : ["/usr/lib/mono", "/usr/local/mono", "/usr/local/bin/mono", @"C:\Program Files\Mono\lib\mono"];
 
                 var monoDir = monoDirs.FirstOrDefault(Directory.Exists);

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/Sdk.cs

@@ -63,7 +63,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 return null;
             }
 
-            var path = Path.Join(version.FullPath, "Roslyn", "bincore", "csc.dll");
+            var path = Path.Combine(version.FullPath, "Roslyn", "bincore", "csc.dll");
             logger.LogDebug($"Source generator CSC: '{path}'");
             if (!File.Exists(path))
             {

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/SourceGenerators/DotnetSourceGeneratorWrapper/DotnetSourceGeneratorWrapper.cs

@@ -41,10 +41,10 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                     .Replace('\\', '/'); // Ensure we're generating the same hash regardless of the OS
                 var name = FileUtils.ComputeHash($"{relativePathToCsProj}\n{this.GetType().Name}");
                 using var tempDir = new TemporaryDirectory(Path.Join(FileUtils.GetTemporaryWorkingDirectory(out _), "source-generator"), "source generator temporary", logger);
-                var analyzerConfigPath = Path.Join(tempDir.DirInfo.FullName, $"{name}.txt");
+                var analyzerConfigPath = Path.Combine(tempDir.DirInfo.FullName, $"{name}.txt");
-                var dllPath = Path.Join(tempDir.DirInfo.FullName, $"{name}.dll");
+                var dllPath = Path.Combine(tempDir.DirInfo.FullName, $"{name}.dll");
-                var cscArgsPath = Path.Join(tempDir.DirInfo.FullName, $"{name}.rsp");
+                var cscArgsPath = Path.Combine(tempDir.DirInfo.FullName, $"{name}.rsp");
-                var outputFolder = Path.Join(targetDir, name);
+                var outputFolder = Path.Combine(targetDir, name);
                 Directory.CreateDirectory(outputFolder);
                 logger.LogInfo("Producing analyzer config content.");
                 GenerateAnalyzerConfig(additionalFiles, csprojFile, analyzerConfigPath);

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/SourceGenerators/DotnetSourceGeneratorWrapper/Razor.cs

@@ -21,7 +21,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 throw new Exception("No SDK path available.");
             }
 
-            SourceGeneratorFolder = Path.Join(sdkPath, "Sdks", "Microsoft.NET.Sdk.Razor", "source-generators");
+            SourceGeneratorFolder = Path.Combine(sdkPath, "Sdks", "Microsoft.NET.Sdk.Razor", "source-generators");
             this.logger.LogInfo($"Razor source generator folder: {SourceGeneratorFolder}");
             if (!Directory.Exists(SourceGeneratorFolder))
             {

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/SourceGenerators/ImplicitUsingsGenerator.cs

@@ -50,7 +50,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
             if (usings.Count > 0)
             {
                 var tempDir = GetTemporaryWorkingDirectory("implicitUsings");
-                var path = Path.Join(tempDir, "GlobalUsings.g.cs");
+                var path = Path.Combine(tempDir, "GlobalUsings.g.cs");
                 using (var writer = new StreamWriter(path))
                 {
                     writer.WriteLine("// <auto-generated/>");

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/SourceGenerators/ResxGenerator.cs

@@ -32,7 +32,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
                 var nugetFolder = nugetPackageRestorer.TryRestore("Microsoft.CodeAnalysis.ResxSourceGenerator");
                 if (nugetFolder is not null)
                 {
-                    sourceGeneratorFolder = System.IO.Path.Join(nugetFolder, "analyzers", "dotnet", "cs");
+                    sourceGeneratorFolder = System.IO.Path.Combine(nugetFolder, "analyzers", "dotnet", "cs");
                 }
             }
             catch (Exception e)

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/SourceGenerators/SourceGeneratorBase.cs

@@ -35,7 +35,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
         /// </summary>
         protected string GetTemporaryWorkingDirectory(string subfolder)
         {
-            var temp = Path.Join(tempWorkingDirectory.ToString(), subfolder);
+            var temp = Path.Combine(tempWorkingDirectory.ToString(), subfolder);
             Directory.CreateDirectory(temp);
 
             return temp;

csharp/extractor/Semmle.Extraction.CSharp/CodeAnalysisExtensions/SymbolExtensions.cs

@@ -664,7 +664,7 @@ namespace Semmle.Extraction.CSharp
                 // Find the (possibly unbound) original extension method that maps to this implementation (if any).
                 var unboundDeclaration = extensions.SelectMany(e => e.GetMembers())
                     .OfType<IMethodSymbol>()
-                    .FirstOrDefault(m => SymbolEqualityComparer.Default.Equals(m.AssociatedExtensionImplementation?.ConstructedFrom, method.ConstructedFrom));
+                    .FirstOrDefault(m => SymbolEqualityComparer.Default.Equals(m.AssociatedExtensionImplementation, method.ConstructedFrom));
 
                 var isFullyConstructed = method.IsBoundGenericMethod();
                 if (isFullyConstructed && unboundDeclaration?.ContainingType is INamedTypeSymbol extensionType)

csharp/extractor/Semmle.Extraction.CSharp/Entities/Accessor.cs

@@ -69,7 +69,6 @@ namespace Semmle.Extraction.CSharp.Entities
             }
 
             Overrides(trapFile);
-            ExtractRefReturn(trapFile, Symbol, this);
 
             if (Symbol.FromSource() && !HasBody)
             {

csharp/extractor/Semmle.Extraction.CSharp/Entities/Expressions/ElementAccess.cs

@@ -1,6 +1,5 @@
 using System.IO;
 using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Semmle.Extraction.Kinds;
 
@@ -9,7 +8,7 @@ namespace Semmle.Extraction.CSharp.Entities.Expressions
     internal abstract class ElementAccess : Expression<ExpressionSyntax>
     {
         protected ElementAccess(ExpressionNodeInfo info, ExpressionSyntax qualifier, BracketedArgumentListSyntax argumentList)
-            : base(info.SetKind(GetKind(info.Context, info.Node, qualifier)))
+            : base(info.SetKind(GetKind(info.Context, qualifier)))
         {
             this.qualifier = qualifier;
             this.argumentList = argumentList;
@@ -18,125 +17,6 @@ namespace Semmle.Extraction.CSharp.Entities.Expressions
         private readonly ExpressionSyntax qualifier;
         private readonly BracketedArgumentListSyntax argumentList;
 
-
-        private ISymbol? GetTargetSymbol()
-        {
-            return Context.GetSymbolInfo(base.Syntax).Symbol;
-        }
-
-        private static void SetExprArgument(TextWriter trapFile, Expression left, Expression right)
-        {
-            trapFile.expr_argument(left, 0);
-            trapFile.expr_argument(right, 0);
-        }
-
-        private Expression MakeZeroFromEndExpression(IExpressionParentEntity parent, int child)
-        {
-            var info = new ExpressionInfo(
-                                Context,
-                                AnnotatedTypeSymbol.CreateNotAnnotated(Context.Compilation.GetSpecialType(SpecialType.System_Int32)),
-                                Location,
-                                ExprKind.INDEX,
-                                parent,
-                                child,
-                                isCompilerGenerated: true,
-                                null);
-
-            var index = new Expression(info);
-
-            MakeZeroLiteral(index, 0);
-            return index;
-        }
-
-        private Expression MakeZeroLiteral(IExpressionParentEntity parent, int child)
-        {
-            return Literal.CreateGenerated(Context, parent, child, Context.Compilation.GetSpecialType(SpecialType.System_Int32), 0, Location);
-        }
-
-
-        /// <summary>
-        /// It is assumed that either the input is
-        /// 1. A normal expression that can be used as endpoint (e.g a constant like "3").
-        /// 2. An index expression indicating that we should read from the end (e.g "^1").
-        /// </summary>
-        /// <param name="syntax">The syntax node representing the range endpoint.</param>
-        /// <param name="parent">The parent expression entity.</param>
-        /// <param name="child">The child index within the parent.</param>
-        /// <returns>An expression representing the endpoint of a range to be used in conjunction with a slice operation.</returns>
-        private Expression MakeFromRangeEndpoint(ExpressionSyntax syntax, IExpressionParentEntity parent, int child)
-        {
-            var info = new ExpressionNodeInfo(Context, syntax, parent, child);
-
-            return syntax.Kind() == SyntaxKind.IndexExpression
-                ? PrefixUnary.Create(info.SetKind(ExprKind.INDEX))
-                : Factory.Create(info);
-        }
-
-        /// <summary>
-        /// Determines whether the given method is a slice method, which is defined as a method with
-        /// the name "Slice" or "Substring" and two parameters.
-        /// </summary>
-        /// <param name="method">The method symbol to check.</param>
-        /// <returns>True if the method is a slice method; false otherwise.</returns>
-        private bool IsSlice(IMethodSymbol method, out RangeExpressionSyntax? range)
-        {
-            range = null;
-
-            if (argumentList.Arguments.Count == 1)
-            {
-                range = argumentList.Arguments[0].Expression as RangeExpressionSyntax;
-            }
-
-            return (method.Name == "Slice" || method.Name == "Substring")
-                && method.Parameters.Length == 2;
-        }
-
-        /// <summary>
-        /// Populates a slice method call based on the given range.
-        /// Roslyn translates indexer accesses with range expressions in the following way.
-        ///   1. s[a..b] -> s.Slice(a, b - a)
-        ///   2. s[..b] -> s.Slice(0, b)
-        ///   3. s[a..] -> s.Slice(a, s.Length - a)
-        ///   4. s[..] -> s.Slice(0, s.Length)
-        /// However, it is possible that both the qualifier or the index endpoints may contain method calls.
-        /// If we want to translate this accurately, we would need to introduce synthetic statements for qualifier and 
-        /// the endpoints, which should then be used in the slice method call.
-        /// To avoid this, we translate as follows.
-        /// 1. s[a..b] -> s.Slice(a, b)
-        /// 2. s[..b] -> s.Slice(0, b)
-        /// 3. s[a..] -> s.Slice(a, ^0)
-        /// 4. s[..] -> s.Slice(0, ^0)
-        /// 
-        /// Even though index expressions can't technically be used in this way, they signal that we
-        /// could perceive ^b as "length - b".
-        ///
-        /// Call arguments are only populated when a range expression is directly available in
-        /// the list of arguments.
-        /// This means that cases like below are not handled.
-        /// System.Range x = 1..3;
-        /// s[x]
-        /// </summary>
-        /// <param name="trapFile">The trap file to write to.</param>
-        /// <param name="slice">The slice method symbol.</param>
-        /// <param name="range">The range expression syntax.</param>
-        private void PopulateSlice(TextWriter trapFile, IMethodSymbol slice, RangeExpressionSyntax? range)
-        {
-            if (range is not null)
-            {
-                // Populate the call arguments
-                var left = range.LeftOperand is ExpressionSyntax lsyntax
-                    ? MakeFromRangeEndpoint(lsyntax, this, 0)
-                    : MakeZeroLiteral(this, 0);
-
-                var right = range.RightOperand is ExpressionSyntax rsyntax
-                    ? MakeFromRangeEndpoint(rsyntax, this, 1)
-                    : MakeZeroFromEndExpression(this, 1);
-
-                SetExprArgument(trapFile, left, right);
-            }
-            trapFile.expr_call(this, Method.Create(Context, slice));
-        }
-
         protected override void PopulateExpression(TextWriter trapFile)
         {
             if (Kind == ExprKind.POINTER_INDIRECTION)
@@ -150,19 +30,11 @@ namespace Semmle.Extraction.CSharp.Entities.Expressions
             else
             {
                 Create(Context, qualifier, this, -1);
-
-                var target = GetTargetSymbol();
-                if (target is IMethodSymbol method && IsSlice(method, out var range))
-                {
-                    // When an indexer on a span or string is used in conjunction with a range expression, the compiler translates
-                    // this into a call to the "Slice" or "Substring" method.
-                    // In this case, we want to populate a slice/substring method call instead of an indexer access.
-                    PopulateSlice(trapFile, method, range);
-                    return;
-                }
-
                 PopulateArguments(trapFile, argumentList, 0);
-                if (target is IPropertySymbol { IsIndexer: true } indexer)
+
+                var symbolInfo = Context.GetSymbolInfo(base.Syntax);
+
+                if (symbolInfo.Symbol is IPropertySymbol indexer)
                 {
                     trapFile.expr_access(this, Indexer.Create(Context, indexer));
                 }
@@ -174,11 +46,8 @@ namespace Semmle.Extraction.CSharp.Entities.Expressions
         private static bool IsArray(ITypeSymbol symbol) =>
             symbol.TypeKind == Microsoft.CodeAnalysis.TypeKind.Array || symbol.IsInlineArray();
 
-        private static ExprKind GetKind(Context cx, ExpressionSyntax syntax, ExpressionSyntax qualifier)
+        private static ExprKind GetKind(Context cx, ExpressionSyntax qualifier)
         {
-            if (cx.GetSymbolInfo(syntax).Symbol is IMethodSymbol)
-                return ExprKind.METHOD_INVOCATION;
-
             var qualifierType = cx.GetType(qualifier);
 
             // This is a compilation error, so make a guess and continue.

csharp/extractor/Semmle.Extraction.CSharp/Entities/Statements/Catch.cs

@@ -23,9 +23,7 @@ namespace Semmle.Extraction.CSharp.Entities.Statements
             }
             else if (isSpecificCatchClause) // A catch clause of the form 'catch(Ex) { ... }'
             {
-                var type = Type.Create(Context, Context.GetType(Stmt.Declaration!.Type));
+                trapFile.catch_type(this, Type.Create(Context, Context.GetType(Stmt.Declaration!.Type)).TypeRef, true);
-                trapFile.catch_type(this, type.TypeRef, true);
-                Expression.Create(Context, Stmt.Declaration!.Type, this, 0);
             }
             else // A catch clause of the form 'catch { ... }'
             {

csharp/extractor/Semmle.Extraction.CSharp/Extractor/CompilerVersion.cs

@@ -67,7 +67,7 @@ namespace Semmle.Extraction.CSharp
                     return;
                 }
 
-                var mscorlibExists = File.Exists(Path.Join(compilerDir, "mscorlib.dll"));
+                var mscorlibExists = File.Exists(Path.Combine(compilerDir, "mscorlib.dll"));
 
                 if (specifiedFramework is null && mscorlibExists)
                 {
@@ -107,7 +107,7 @@ namespace Semmle.Extraction.CSharp
         /// <summary>
         /// The file csc.rsp.
         /// </summary>
-        private string CscRsp => Path.Join(FrameworkPath, csc_rsp);
+        private string CscRsp => Path.Combine(FrameworkPath, csc_rsp);
 
         /// <summary>
         /// Should we skip extraction?

csharp/extractor/Semmle.Extraction.CSharp/Extractor/Context.cs

@@ -680,7 +680,7 @@ namespace Semmle.Extraction.CSharp
             {
                 try
                 {
-                    var fullPath = Path.GetFullPath(Path.Join(Path.GetDirectoryName(mappedFromPath)!, mappedToPath));
+                    var fullPath = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(mappedFromPath)!, mappedToPath));
                     ExtractionContext.Logger.LogDebug($"Found relative path in line mapping: '{mappedToPath}', interpreting it as '{fullPath}'");
 
                     mappedToPath = fullPath;

csharp/extractor/Semmle.Extraction.CSharp/Extractor/CsProjFile.cs

@@ -159,11 +159,7 @@ namespace Semmle.Extraction.CSharp
                 return null;
             }
 
-            var normalized = Path.DirectorySeparatorChar == '/' ? file.Replace("\\", "/") : file;
+            return Path.GetFullPath(Path.Combine(projDir?.FullName ?? string.Empty, Path.DirectorySeparatorChar == '/' ? file.Replace("\\", "/") : file));
-            var path = projDir is not null && !Path.IsPathRooted(normalized)
-                ? Path.Join(projDir.FullName, normalized)
-                : normalized;
-            return Path.GetFullPath(path);
         }
 
         private readonly string[] references;

csharp/extractor/Semmle.Extraction.CSharp/Extractor/Extractor.cs

@@ -210,7 +210,7 @@ namespace Semmle.Extraction.CSharp
                             TracingAnalyser.GetOutputName(compilation, args),
                             compilation,
                             generatedSyntaxTrees,
-                            Path.Join(compilationIdentifierPath, diagnosticName),
+                            Path.Combine(compilationIdentifierPath, diagnosticName),
                             options),
                         () => { });
 
@@ -377,7 +377,7 @@ namespace Semmle.Extraction.CSharp
                 else
                 {
                     var composed = referencePaths.Value
-                        .Select(path => Path.Join(path, clref.Reference))
+                        .Select(path => Path.Combine(path, clref.Reference))
                         .Where(path => File.Exists(path))
                         .Select(path => analyser.PathCache.GetCanonicalPath(path))
                         .FirstOrDefault();
@@ -559,13 +559,13 @@ namespace Semmle.Extraction.CSharp
         /// Gets the path to the `csharp.log` file written to by the C# extractor.
         /// </summary>
         public static string GetCSharpLogPath() =>
-            Path.Join(GetCSharpLogDirectory(), "csharp.log");
+            Path.Combine(GetCSharpLogDirectory(), "csharp.log");
 
         /// <summary>
         /// Gets the path to a `csharp.{hash}.txt` file written to by the C# extractor.
         /// </summary>
         public static string GetCSharpArgsLogPath(string hash) =>
-            Path.Join(GetCSharpLogDirectory(), $"csharp.{hash}.txt");
+            Path.Combine(GetCSharpLogDirectory(), $"csharp.{hash}.txt");
 
         /// <summary>
         /// Gets a list of all `csharp.{hash}.txt` files currently written to the log directory.

csharp/extractor/Semmle.Extraction.CSharp/Extractor/TracingAnalyser.cs

@@ -131,7 +131,7 @@ namespace Semmle.Extraction.CSharp
                 return Path.ChangeExtension(entryPointFilename, ".exe");
             }
 
-            return Path.Join(commandLineArguments.OutputDirectory, commandLineArguments.OutputFileName);
+            return Path.Combine(commandLineArguments.OutputDirectory, commandLineArguments.OutputFileName);
         }
 
         private int LogDiagnostics()

csharp/extractor/Semmle.Extraction.CSharp/Extractor/TrapWriter.cs

@@ -61,7 +61,7 @@ namespace Semmle.Extraction.CSharp
                      * Although GetRandomFileName() is cryptographically secure,
                      * there's a tiny chance the file could already exists.
                      */
-                    tmpFile = Path.Join(tempPath, Path.GetRandomFileName());
+                    tmpFile = Path.Combine(tempPath, Path.GetRandomFileName());
                 }
                 while (File.Exists(tmpFile));
 

csharp/extractor/Semmle.Util.Tests/CanonicalPathCache.cs

@@ -82,13 +82,13 @@ namespace SemmleTests.Semmle.Util
         [Fact]
         public void CanonicalPathMissingFile()
         {
-            Assert.Equal(Path.Join(Directory.GetCurrentDirectory(), "NOSUCHFILE"), cache.GetCanonicalPath("NOSUCHFILE"));
+            Assert.Equal(Path.Combine(Directory.GetCurrentDirectory(), "NOSUCHFILE"), cache.GetCanonicalPath("NOSUCHFILE"));
         }
 
         [Fact]
         public void CanonicalPathMissingAbsolutePath()
         {
-            Assert.Equal(Path.Join(root, "no", "such", "file"), cache.GetCanonicalPath(Path.Join(root, "no", "such", "file")));
+            Assert.Equal(Path.Combine(root, "no", "such", "file"), cache.GetCanonicalPath(Path.Combine(root, "no", "such", "file")));
 
             if (Win32.IsWindows())
                 Assert.Equal(@"C:\Windows\no\such\file", cache.GetCanonicalPath(@"C:\windOws\no\such\file"));
@@ -97,7 +97,7 @@ namespace SemmleTests.Semmle.Util
         [Fact]
         public void CanonicalPathMissingRelativePath()
         {
-            Assert.Equal(Path.Join(Directory.GetCurrentDirectory(), "NO", "SUCH"), cache.GetCanonicalPath(Path.Join("NO", "SUCH")));
+            Assert.Equal(Path.Combine(Directory.GetCurrentDirectory(), "NO", "SUCH"), cache.GetCanonicalPath(Path.Combine("NO", "SUCH")));
         }
 
         [Fact]
@@ -125,7 +125,7 @@ namespace SemmleTests.Semmle.Util
         public void CanonicalPathDots()
         {
             var abcPath = Path.GetFullPath("abc");
-            Assert.Equal(abcPath, cache.GetCanonicalPath(Path.Join("foo", ".", "..", "abc")));
+            Assert.Equal(abcPath, cache.GetCanonicalPath(Path.Combine("foo", ".", "..", "abc")));
         }
 
         [Fact]

csharp/extractor/Semmle.Util.Tests/LongPaths.cs

@@ -14,20 +14,20 @@ namespace SemmleTests.Semmle.Util
     public sealed class LongPaths
     {
         private static readonly string tmpDir = Environment.GetEnvironmentVariable("TEST_TMPDIR") ?? Path.GetTempPath();
-        private static readonly string longPathDir = Path.Join(tmpDir, "aaaaaaaaaaaaaaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
+        private static readonly string longPathDir = Path.Combine(tmpDir, "aaaaaaaaaaaaaaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
             "ccccccccccccccccccccccccccccccc", "ddddddddddddddddddddddddddddddddddddd", "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeee", "fffffffffffffffffffffffffffffffff",
             "ggggggggggggggggggggggggggggggggggg", "hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
 
         private static string MakeLongPath()
         {
             var uniquePostfix = Guid.NewGuid().ToString("N");
-            return Path.Join(longPathDir, $"iiiiiiiiiiiiiiii{uniquePostfix}.txt");
+            return Path.Combine(longPathDir, $"iiiiiiiiiiiiiiii{uniquePostfix}.txt");
         }
 
         private static string MakeShortPath()
         {
             var uniquePostfix = Guid.NewGuid().ToString("N");
-            return Path.Join(tmpDir, $"test{uniquePostfix}.txt");
+            return Path.Combine(tmpDir, $"test{uniquePostfix}.txt");
         }
 
         public LongPaths()
@@ -62,7 +62,7 @@ namespace SemmleTests.Semmle.Util
         [Fact]
         public void ParentDirectory()
         {
-            Assert.Equal("abc", Path.GetDirectoryName(Path.Join("abc", "def")));
+            Assert.Equal("abc", Path.GetDirectoryName(Path.Combine("abc", "def")));
             Assert.Equal(Win32.IsWindows() ? "\\" : "/", Path.GetDirectoryName($@"{Path.DirectorySeparatorChar}def"));
             Assert.Equal("", Path.GetDirectoryName(@"def"));
 

csharp/extractor/Semmle.Util/BuildActions.cs

@@ -137,11 +137,11 @@ namespace Semmle.Util
         bool IsMonoInstalled();
 
         /// <summary>
-        /// Joins path segments, Path.Join().
+        /// Combine path segments, Path.Combine().
         /// </summary>
         /// <param name="parts">The parts of the path.</param>
         /// <returns>The combined path.</returns>
-        string PathJoin(params string[] parts);
+        string PathCombine(params string[] parts);
 
         /// <summary>
         /// Gets the full path for <paramref name="path"/>, Path.GetFullPath().
@@ -293,7 +293,7 @@ namespace Semmle.Util
             }
         }
 
-        string IBuildActions.PathJoin(params string[] parts) => Path.Join(parts);
+        string IBuildActions.PathCombine(params string[] parts) => Path.Combine(parts);
 
         void IBuildActions.WriteAllText(string filename, string contents) => File.WriteAllText(filename, contents);
 

csharp/extractor/Semmle.Util/CanonicalPathCache.cs

@@ -43,7 +43,7 @@ namespace Semmle.Util
             var parent = Directory.GetParent(path);
 
             return parent is not null ?
-                Path.Join(cache.GetCanonicalPath(parent.FullName), Path.GetFileName(path)) :
+                Path.Combine(cache.GetCanonicalPath(parent.FullName), Path.GetFileName(path)) :
                 path.ToUpperInvariant();
         }
     }
@@ -138,12 +138,12 @@ namespace Semmle.Util
                 var entries = Directory.GetFileSystemEntries(parentPath, name);
                 return entries.Length == 1
                     ? entries[0]
-                    : Path.Join(parentPath, name);
+                    : Path.Combine(parentPath, name);
             }
             catch  // lgtm[cs/catch-of-all-exceptions]
             {
                 // IO error or security error querying directory.
-                return Path.Join(parentPath, name);
+                return Path.Combine(parentPath, name);
             }
         }
     }

csharp/extractor/Semmle.Util/FileUtils.cs

@@ -82,7 +82,7 @@ namespace Semmle.Util
             {
                 exes = new[] { prog };
             }
-            var candidates = paths?.Where(path => exes.Any(exe0 => File.Exists(Path.Join(path, exe0))));
+            var candidates = paths?.Where(path => exes.Any(exe0 => File.Exists(Path.Combine(path, exe0))));
             return candidates?.FirstOrDefault();
         }
 
@@ -179,7 +179,7 @@ namespace Semmle.Util
             {
                 innerpath = ConvertPathToSafeRelativePath(innerpath);
 
-                nested = Path.Join(outerpath, innerpath);
+                nested = Path.Combine(outerpath, innerpath);
             }
             try
             {
@@ -203,7 +203,7 @@ namespace Semmle.Util
         {
             var tempPath = Path.GetTempPath();
             var name = Guid.NewGuid().ToString("N").ToUpper();
-            var tempFolder = Path.Join(tempPath, "GitHub", name);
+            var tempFolder = Path.Combine(tempPath, "GitHub", name);
             Directory.CreateDirectory(tempFolder);
             return tempFolder;
         });
@@ -231,7 +231,7 @@ namespace Semmle.Util
             string outputPath;
             do
             {
-                outputPath = Path.Join(tempFolder, Path.GetRandomFileName() + extension);
+                outputPath = Path.Combine(tempFolder, Path.GetRandomFileName() + extension);
             }
             while (File.Exists(outputPath));
 

csharp/paket.dependencies

@@ -4,7 +4,7 @@ source https://api.nuget.org/v3/index.json
 # behave like nuget in choosing transitive dependency versions
 strategy: max
 
-nuget Basic.CompilerLog.Util 0.9.39
+nuget Basic.CompilerLog.Util 0.9.25
 nuget Mono.Posix.NETStandard
 nuget Newtonsoft.Json
 nuget NuGet.Versioning
@@ -12,7 +12,7 @@ nuget xunit
 nuget xunit.runner.visualstudio
 nuget xunit.runner.utility
 nuget Microsoft.NET.Test.Sdk
-nuget Microsoft.CodeAnalysis.CSharp 5.3.0
+nuget Microsoft.CodeAnalysis.CSharp 5.0.0
-nuget Microsoft.CodeAnalysis 5.3.0
+nuget Microsoft.CodeAnalysis 5.0.0
-nuget Microsoft.Build 18.6.3
+nuget Microsoft.Build 18.0.2
 nuget Microsoft.VisualStudio.SolutionPersistence

csharp/paket.lock

@@ -3,42 +3,45 @@ STRATEGY: MAX
 RESTRICTION: == net10.0
 NUGET
   remote: https://api.nuget.org/v3/index.json
-    Basic.CompilerLog.Util (0.9.39)
+    Basic.CompilerLog.Util (0.9.25)
       MessagePack (>= 3.1.4)
-      Microsoft.Bcl.Memory (>= 10.0.7)
+      Microsoft.Bcl.Memory (>= 9.0.10)
       Microsoft.CodeAnalysis (>= 4.8)
       Microsoft.CodeAnalysis.CSharp (>= 4.8)
       Microsoft.CodeAnalysis.VisualBasic (>= 4.8)
-      Microsoft.Extensions.ObjectPool (>= 10.0.7)
+      Microsoft.Extensions.ObjectPool (>= 9.0.10)
-      MSBuild.StructuredLogger (>= 2.3.178)
+      MSBuild.StructuredLogger (>= 2.3.71)
+      NaturalSort.Extension (>= 4.4)
+      NuGet.Versioning (>= 6.14)
     Humanizer.Core (3.0.10)
-    MessagePack (3.1.6)
+    MessagePack (3.1.4)
-      MessagePack.Annotations (>= 3.1.6)
+      MessagePack.Annotations (>= 3.1.4)
-      MessagePackAnalyzer (>= 3.1.6)
+      MessagePackAnalyzer (>= 3.1.4)
       Microsoft.NET.StringTools (>= 17.11.4)
-    MessagePack.Annotations (3.1.6)
+    MessagePack.Annotations (3.1.4)
-    MessagePackAnalyzer (3.1.6)
+    MessagePackAnalyzer (3.1.4)
     Microsoft.Bcl.AsyncInterfaces (10.0.8)
     Microsoft.Bcl.Memory (10.0.8)
-    Microsoft.Build (18.6.3)
+    Microsoft.Build (18.0.2)
-      Microsoft.Build.Framework (>= 18.6.3)
+      Microsoft.Build.Framework (>= 18.0.2)
-      System.Configuration.ConfigurationManager (>= 10.0.3)
+      Microsoft.NET.StringTools (>= 18.0.2)
-      System.Diagnostics.EventLog (>= 10.0.3)
+      System.Configuration.ConfigurationManager (>= 9.0)
-      System.Reflection.MetadataLoadContext (>= 10.0.3)
+      System.Diagnostics.EventLog (>= 9.0)
-      System.Security.Cryptography.ProtectedData (>= 10.0.3)
+      System.Reflection.MetadataLoadContext (>= 9.0)
-    Microsoft.Build.Framework (18.6.3)
+      System.Security.Cryptography.ProtectedData (>= 9.0.6)
-      Microsoft.NET.StringTools (>= 18.6.3)
+    Microsoft.Build.Framework (18.4)
-    Microsoft.Build.Utilities.Core (18.6.3)
+    Microsoft.Build.Utilities.Core (18.4)
-      Microsoft.Build.Framework (>= 18.6.3)
+      Microsoft.Build.Framework (>= 18.4)
-      System.Configuration.ConfigurationManager (>= 10.0.3)
+      Microsoft.NET.StringTools (>= 18.4)
-      System.Diagnostics.EventLog (>= 10.0.3)
+      System.Configuration.ConfigurationManager (>= 10.0.1)
-      System.Security.Cryptography.ProtectedData (>= 10.0.3)
+      System.Diagnostics.EventLog (>= 10.0.1)
-    Microsoft.CodeAnalysis (5.3)
+      System.Security.Cryptography.ProtectedData (>= 10.0.1)
+    Microsoft.CodeAnalysis (5.0)
       Humanizer.Core (>= 2.14.1)
       Microsoft.Bcl.AsyncInterfaces (>= 9.0)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.CSharp.Workspaces (5.3)
+      Microsoft.CodeAnalysis.CSharp.Workspaces (5.0)
-      Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.3)
+      Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.0)
       System.Buffers (>= 4.6)
       System.Collections.Immutable (>= 9.0)
       System.Composition (>= 9.0)
@@ -51,36 +54,36 @@ NUGET
       System.Threading.Channels (>= 8.0)
       System.Threading.Tasks.Extensions (>= 4.6)
     Microsoft.CodeAnalysis.Analyzers (5.3)
-    Microsoft.CodeAnalysis.Common (5.3)
+    Microsoft.CodeAnalysis.Common (5.0)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-    Microsoft.CodeAnalysis.CSharp (5.3)
+    Microsoft.CodeAnalysis.CSharp (5.0)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.Common (5.3)
+      Microsoft.CodeAnalysis.Common (5.0)
-    Microsoft.CodeAnalysis.CSharp.Workspaces (5.3)
+    Microsoft.CodeAnalysis.CSharp.Workspaces (5.0)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.Common (5.3)
+      Microsoft.CodeAnalysis.Common (5.0)
-      Microsoft.CodeAnalysis.CSharp (5.3)
+      Microsoft.CodeAnalysis.CSharp (5.0)
-      Microsoft.CodeAnalysis.Workspaces.Common (5.3)
+      Microsoft.CodeAnalysis.Workspaces.Common (5.0)
       System.Composition (>= 9.0)
-    Microsoft.CodeAnalysis.VisualBasic (5.3)
+    Microsoft.CodeAnalysis.VisualBasic (5.0)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.Common (5.3)
+      Microsoft.CodeAnalysis.Common (5.0)
-    Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.3)
+    Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.0)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.Common (5.3)
+      Microsoft.CodeAnalysis.Common (5.0)
-      Microsoft.CodeAnalysis.VisualBasic (5.3)
+      Microsoft.CodeAnalysis.VisualBasic (5.0)
-      Microsoft.CodeAnalysis.Workspaces.Common (5.3)
+      Microsoft.CodeAnalysis.Workspaces.Common (5.0)
       System.Composition (>= 9.0)
-    Microsoft.CodeAnalysis.Workspaces.Common (5.3)
+    Microsoft.CodeAnalysis.Workspaces.Common (5.0)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
+      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
-      Microsoft.CodeAnalysis.Common (5.3)
+      Microsoft.CodeAnalysis.Common (5.0)
       System.Composition (>= 9.0)
     Microsoft.CodeCoverage (18.5.1)
     Microsoft.Extensions.ObjectPool (10.0.8)
-    Microsoft.NET.StringTools (18.6.3)
+    Microsoft.NET.StringTools (18.4)
     Microsoft.NET.Test.Sdk (18.5.1)
       Microsoft.CodeCoverage (>= 18.5.1)
       Microsoft.TestPlatform.TestHost (>= 18.5.1)
@@ -94,6 +97,7 @@ NUGET
     MSBuild.StructuredLogger (2.3.204)
       Microsoft.Build.Framework (>= 17.5)
       Microsoft.Build.Utilities.Core (>= 17.5)
+    NaturalSort.Extension (4.4.1)
     Newtonsoft.Json (13.0.4)
     NuGet.Versioning (7.6)
     System.Buffers (4.6.1)

csharp/ql/campaigns/Solorigate/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/csharp-solorigate-all
-version: 1.7.69-dev
+version: 1.7.68
 groups:
   - csharp
   - solorigate

csharp/ql/campaigns/Solorigate/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/csharp-solorigate-queries
-version: 1.7.69-dev
+version: 1.7.68
 groups:
   - csharp
   - solorigate

csharp/ql/integration-tests/posix/standalone_dependencies_executing_runtime/Assemblies.expected

@@ -22,6 +22,7 @@
 | [...]/csharp/tools/[...]/Microsoft.Win32.Primitives.dll |
 | [...]/csharp/tools/[...]/Microsoft.Win32.Registry.dll |
 | [...]/csharp/tools/[...]/Mono.Posix.NETStandard.dll |
+| [...]/csharp/tools/[...]/NaturalSort.Extension.dll |
 | [...]/csharp/tools/[...]/Newtonsoft.Json.dll |
 | [...]/csharp/tools/[...]/NuGet.Versioning.dll |
 | [...]/csharp/tools/[...]/StructuredLogger.dll |

csharp/ql/lib/change-notes/2026-05-19-properties-indexers-refreturn.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Improved call target resolution for ref-return properties and indexers.

csharp/ql/lib/change-notes/2026-05-21-spanaccess-range.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Improved extraction of range-access expressions on spans and strings (for example, `a[0..3]`). These expressions are now extracted as `Slice` (span) or `Substring` (string) calls.

csharp/ql/lib/change-notes/2026-05-22-property-indexer-partial-override.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* Improved property and indexer call target resolution for partially overridden properties and indexers.

csharp/ql/lib/change-notes/2026-06-12-razor-page-handler-sources.md

@@ -1,4 +0,0 @@
----
-category: majorAnalysis
----
-* Added Razor Page handler method parameters (e.g., `OnGet`, `OnPost`, `OnPostAsync`) as remote flow sources, enabling security queries such as `cs/sql-injection` to detect vulnerabilities in `PageModel` subclasses.

csharp/ql/lib/change-notes/2026-06-12-restructure-operations.md

@@ -1,4 +0,0 @@
----
-category: breaking
----
-* Renamed types related to *operation* expressions. The QL classes `BinaryArithmeticOperation`, `BinaryBitwiseOperation`, and `BinaryLogicalOperation` now include compound assignments; for example, `BinaryArithmeticOperation` now includes `a += b`.

csharp/ql/lib/experimental/code/csharp/Cryptography/NonCryptographicHashes.qll

@@ -50,15 +50,15 @@ private predicate maybeUsedInElfHashFunction(Variable v, Operation xor, Operatio
   |
     add instanceof AddOperation and
     e1.getAChild*() = add.getAnOperand() and
-    e1 instanceof BinaryBitwiseExpr and
+    e1 instanceof BinaryBitwiseOperation and
-    e2 = e1.(BinaryBitwiseExpr).getLeftOperand() and
+    e2 = e1.(BinaryBitwiseOperation).getLeftOperand() and
     v = addAssign.getTargetVariable() and
     addAssign.getAChild*() = add and
     (xor instanceof BitwiseXorExpr or xor instanceof AssignXorExpr) and
     addAssign.getControlFlowNode().getASuccessor*() = xor.getControlFlowNode() and
     xorAssign.getAChild*() = xor and
     v = xorAssign.getTargetVariable() and
-    (notOp instanceof UnaryBitwiseOperation or notOp instanceof AssignBitwiseExpr) and
+    (notOp instanceof UnaryBitwiseOperation or notOp instanceof AssignBitwiseOperation) and
     xor.getControlFlowNode().getASuccessor*() = notOp.getControlFlowNode() and
     notAssign.getAChild*() = notOp and
     v = notAssign.getTargetVariable() and

csharp/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/csharp-all
-version: 6.0.3-dev
+version: 6.0.2
 groups: csharp
 dbscheme: semmlecode.csharp.dbscheme
 extractor: csharp
@@ -9,7 +9,6 @@ dependencies:
   codeql/controlflow: ${workspace}
   codeql/dataflow: ${workspace}
   codeql/mad: ${workspace}
-  codeql/rangeanalysis: ${workspace}
   codeql/ssa: ${workspace}
   codeql/threat-models: ${workspace}
   codeql/tutorial: ${workspace}

csharp/ql/lib/semmle/code/csharp/Assignable.qll

@@ -290,7 +290,7 @@ module AssignableInternal {
     newtype TAssignableDefinition =
       TAssignmentDefinition(Assignment a) {
         not a.getLeftOperand() instanceof TupleExpr and
-        not a instanceof AssignCallExpr and
+        not a instanceof AssignCallOperation and
         not a instanceof AssignCoalesceExpr
       } or
       TTupleAssignmentDefinition(AssignExpr ae, Expr leaf) { tupleAssignmentDefinition(ae, leaf) } or
@@ -324,7 +324,7 @@ module AssignableInternal {
       TAddressOfDefinition(AddressOfExpr aoe) or
       TPatternDefinition(TopLevelPatternDecl tlpd) or
       TAssignOperationDefinition(AssignOperation ao) {
-        ao instanceof AssignCallExpr and not ao instanceof CompoundAssignmentOperatorCall
+        ao instanceof AssignCallOperation and not ao instanceof CompoundAssignmentOperatorCall
         or
         ao instanceof AssignCoalesceExpr
       }