Python: deprecate Function.getAReturnValueFlowNode() and rewrite internal callers

Follow-up to the getAFlowNode deprecation in the same PR: same AST→legacy-CFG
bridge pattern. The 11 internal call sites (across objects/, types/,
frameworks/, and TypeTrackingImpl) are rewritten to bind a `Return ret`
explicitly, then constrain via `ret.getScope() = f and n.getNode() = ret.getValue()`.

The predicate itself is preserved with a deprecation note so external
users do not experience churn.

Semantic noop.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

actions/ql/lib/qlpack.yml

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

actions/ql/src/qlpack.yml

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

cpp/ql/lib/DefaultOptions.qll

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

@@ -98,57 +98,3 @@ 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

@@ -0,0 +1,15 @@
+---
+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

@@ -32,7 +32,6 @@ 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: 10.2.0
+version: 10.2.1-dev
 groups: cpp
 dbscheme: semmlecode.cpp.dbscheme
 extractor: cpp

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

@@ -148,28 +148,3 @@ 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

@@ -1,6 +0,0 @@
-/**
- * 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

@@ -35,13 +35,6 @@ 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/dataflow/ExternalFlow.qll

@@ -276,6 +276,45 @@ 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
@@ -292,7 +331,7 @@ private predicate isFunctionConstructedFrom(Function f, Function templateFunc) {
 }
 
 /** Gets the fully templated version of `f`. */
-Function getFullyTemplatedFunction(Function f) {
+private Function getFullyTemplatedFunctionOld(Function f) {
   not f.isFromUninstantiatedTemplate(_) and
   (
     exists(Class c, Class templateClass, int i |
@@ -306,13 +345,46 @@ Function getFullyTemplatedFunction(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 const, or returns `s` otherwise. */
+/** Prefixes `volatile` to `s` if `t` is volatile, or returns `s` otherwise. */
 bindingset[s, t]
 private string withVolatile(string s, Type t) {
   if t.isVolatile() then result = "volatile " + s else result = s
@@ -490,7 +562,7 @@ 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 |
-    isClassConstructedFrom(f.getDeclaringType(), template) and
+    template = getFullyTemplatedClass(f.getDeclaringType()) and
     remaining = getNumberOfSupportedClassTemplateArguments(template) and
     result = getTypeNameWithoutFunctionTemplates(f, n, 0)
   )
@@ -502,7 +574,7 @@ private string getTypeNameWithoutClassTemplates(Function f, int n, int remaining
   or
   exists(string mid, TypeTemplateParameter tp, Class template |
     mid = getTypeNameWithoutClassTemplates(f, n, remaining + 1) and
-    isClassConstructedFrom(f.getDeclaringType(), template) and
+    template = getFullyTemplatedClass(f.getDeclaringType()) and
     tp = getSupportedClassTemplateArgument(template, remaining)
   |
     result = mid.replaceAll(tp.getName(), "class:" + remaining.toString())

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

@@ -1,59 +1,5 @@
 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
@@ -103,10 +49,7 @@ 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/src/qlpack.yml

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

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

@@ -51,13 +51,16 @@ 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: Azure::Core::IO; BodyStream; true; Read; ; ; Argument[-1]; Argument[*0]; taint; manual |
+| 53 | Summary: ; TemplateClass1; true; templateFunction2<U,V>; (U,V); ; Argument[1]; ReturnValue; value; manual |
-| 54 | Summary: Azure::Core::IO; BodyStream; true; ReadToCount; ; ; Argument[-1]; Argument[*0]; taint; manual |
+| 54 | Summary: ; TemplateClass1<T>; false; templateFunction<U>; (T,U); ; Argument[0]; ReturnValue; value; manual |
-| 55 | Summary: Azure::Core::IO; BodyStream; true; ReadToEnd; ; ; Argument[-1]; ReturnValue.Element; taint; manual |
+| 55 | Summary: ; TemplateClass2<T,U>; true; function; (U,T); ; Argument[1]; ReturnValue; value; manual |
-| 56 | Summary: Azure; Nullable; true; Value; ; ; Argument[-1]; ReturnValue[*]; taint; manual |
+| 56 | Summary: Azure::Core::IO; BodyStream; true; Read; ; ; Argument[-1]; Argument[*0]; taint; manual |
-| 57 | Summary: boost::asio; ; false; buffer; ; ; Argument[*0]; ReturnValue; taint; manual |
+| 57 | Summary: Azure::Core::IO; BodyStream; true; ReadToCount; ; ; Argument[-1]; Argument[*0]; 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:57 |
+| 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: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 |
@@ -66,24 +69,24 @@ 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:57 |
+| asio_streams.cpp:100:64:100:71 | *send_str | asio_streams.cpp:100:44:100:62 | call to buffer | provenance | MaD:60 |
-| 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: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: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: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: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: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: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 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] 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:53 |
+| azure.cpp:257:5:257:8 | *resp | azure.cpp:257:16:257:21 | Read output argument | provenance | MaD:56 |
 | 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:54 |
+| azure.cpp:262:5:262:8 | *resp | azure.cpp:262:23:262:28 | ReadToCount output argument | provenance | MaD:57 |
 | 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:55 |
+| azure.cpp:266:38:266:41 | *resp | azure.cpp:266:44:266:52 | call to ReadToEnd [element] | provenance | MaD:58 |
 | 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 |  |
@@ -100,11 +103,11 @@ 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:55 |
+| azure.cpp:282:21:282:23 | *call to get | azure.cpp:282:28:282:36 | call to ReadToEnd [element] | provenance | MaD:58 |
 | azure.cpp:282:28:282:36 | 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:56 |
+| azure.cpp:289:24:289:56 | call to GetHeader | azure.cpp:289:63:289:65 | call to Value | provenance | MaD:59 |
 | 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 |  |
@@ -180,6 +183,39 @@ 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 |  |
@@ -483,6 +519,43 @@ 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 |
@@ -688,6 +761,11 @@ 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

@@ -19,3 +19,6 @@ extensions:
       - ["", "", 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"]
+      - ["", "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

@@ -15,3 +15,7 @@
 | 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

@@ -9,6 +9,10 @@
 | 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

@@ -118,3 +118,57 @@ 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

@@ -27383,54 +27383,55 @@ 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:148:3:148:14 | basic_string | 0 | const class:2 & |
+| stl.h:147:12:147:23 | basic_string | 0 | const class:2 & |
-| stl.h:149:33:149:44 | basic_string | 0 | const class:0 * |
+| stl.h:148:3:148:14 | basic_string | 0 | const class:0 * |
-| stl.h:149:33:149:44 | basic_string | 1 | const class:2 & |
+| stl.h:148:3:148:14 | basic_string | 1 | const class:2 & |
-| stl.h:151:16:151:20 | c_str | 0 | func:0 |
+| stl.h:149:33:149:44 | basic_string | 0 | func:0 |
-| stl.h:151:16:151:20 | c_str | 1 | func:0 |
+| stl.h:149:33:149:44 | basic_string | 1 | func:0 |
-| stl.h:151:16:151:20 | c_str | 2 | const class:2 & |
+| stl.h:149:33:149:44 | basic_string | 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 | 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:177:17:177:26 | operator+= | 0 | const func:0 & |
+| stl.h:177:17:177:26 | operator+= | 0 | const class:0 * |
-| stl.h:178:17:178:22 | append | 0 | const class:0 * |
+| stl.h:178:17:178:22 | append | 0 | const basic_string & |
-| stl.h:179:17:179:22 | append | 0 | const basic_string & |
+| stl.h:179:17:179:22 | append | 0 | const class:0 * |
-| stl.h:180:17:180:22 | append | 0 | const class:0 * |
+| stl.h:180:17:180:22 | append | 0 | size_type |
-| stl.h:181:47:181:52 | append | 0 | size_type |
+| stl.h:180:17:180:22 | append | 1 | class:0 |
-| stl.h:181:47:181:52 | append | 1 | class:0 |
+| stl.h:181:47:181:52 | append | 0 | func:0 |
-| stl.h:182:17:182:22 | assign | 0 | func:0 |
+| stl.h:181:47:181:52 | append | 1 | func:0 |
-| stl.h:182:17:182:22 | assign | 1 | func:0 |
+| stl.h:182:17:182:22 | assign | 0 | const basic_string & |
-| stl.h:183:17:183:22 | assign | 0 | const basic_string & |
+| stl.h:183:17:183:22 | assign | 0 | size_type |
-| stl.h:184:47:184:52 | assign | 0 | size_type |
+| stl.h:183:17:183:22 | assign | 1 | class:0 |
-| stl.h:184:47:184:52 | assign | 1 | class:0 |
+| stl.h:184:47:184:52 | assign | 0 | func:0 |
-| stl.h:185:17:185:22 | insert | 0 | func:0 |
+| stl.h:184:47:184:52 | assign | 1 | func:0 |
-| stl.h:185:17:185:22 | insert | 1 | func:0 |
+| stl.h:185:17:185:22 | insert | 0 | size_type |
+| 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 | const basic_string & |
+| stl.h:186:17:186:22 | insert | 1 | size_type |
+| 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 | size_type |
+| stl.h:187:17:187:22 | insert | 1 | const class:0 * |
-| stl.h:187:17:187:22 | insert | 2 | class:0 |
+| stl.h:188:12:188:17 | insert | 0 | const_iterator |
-| stl.h:188:12:188:17 | insert | 0 | size_type |
+| stl.h:188:12:188:17 | insert | 1 | size_type |
-| stl.h:188:12:188:17 | insert | 1 | const class:0 * |
+| stl.h:188:12:188:17 | insert | 2 | class:0 |
 | stl.h:189:42:189:47 | insert | 0 | const_iterator |
-| stl.h:189:42:189:47 | insert | 1 | size_type |
+| stl.h:189:42:189:47 | insert | 1 | func:0 |
-| stl.h:189:42:189:47 | insert | 2 | class:0 |
+| stl.h:189:42:189:47 | insert | 2 | func:0 |
-| stl.h:190:17:190:23 | replace | 0 | const_iterator |
+| stl.h:190:17:190:23 | replace | 0 | size_type |
-| stl.h:190:17:190:23 | replace | 1 | func:0 |
+| stl.h:190:17:190:23 | replace | 1 | size_type |
-| stl.h:190:17:190:23 | replace | 2 | func:0 |
+| stl.h:190:17:190:23 | replace | 2 | const basic_string & |
 | 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 | const basic_string & |
+| stl.h:191:17:191:23 | replace | 2 | size_type |
-| stl.h:192:13:192:16 | copy | 0 | size_type |
+| stl.h:191:17:191:23 | replace | 3 | class:0 |
+| 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:192:13:192:16 | copy | 3 | class:0 |
+| stl.h:194:16:194:21 | substr | 0 | size_type |
-| stl.h:193:8:193:12 | clear | 0 | class:0 * |
+| stl.h:194:16:194:21 | substr | 1 | size_type |
-| stl.h:193:8:193:12 | clear | 1 | size_type |
+| stl.h:195:8:195:11 | swap | 0 | basic_string & |
-| 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:10:26:10:26 | F<D> |
+| 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<T> |
-| file://:0:0:0:0 | E<D>'s friend | loop.cpp:5:26:5:26 | E<C> |
+| 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<T> |
-| 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:5:26:5:29 | E<C> |
 | file://:0:0:0:0 | E<D>'s friend | loop.cpp:10:26:10:26 | F<T> |
-| file://:0:0:0:0 | F<D>'s friend | loop.cpp:5:26:5:26 | E<C> |
+| 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<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> |

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, method.ConstructedFrom));
+                    .FirstOrDefault(m => SymbolEqualityComparer.Default.Equals(m.AssociatedExtensionImplementation?.ConstructedFrom, method.ConstructedFrom));
 
                 var isFullyConstructed = method.IsBoundGenericMethod();
                 if (isFullyConstructed && unboundDeclaration?.ContainingType is INamedTypeSymbol extensionType)

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

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

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 0.9.25
+nuget Basic.CompilerLog.Util 0.9.39
 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 5.0.0
+nuget Microsoft.CodeAnalysis.CSharp 5.3.0
-nuget Microsoft.CodeAnalysis 5.0.0
+nuget Microsoft.CodeAnalysis 5.3.0
-nuget Microsoft.Build 18.0.2
+nuget Microsoft.Build 18.6.3
 nuget Microsoft.VisualStudio.SolutionPersistence

csharp/paket.lock

@@ -3,45 +3,42 @@ STRATEGY: MAX
 RESTRICTION: == net10.0
 NUGET
   remote: https://api.nuget.org/v3/index.json
-    Basic.CompilerLog.Util (0.9.25)
+    Basic.CompilerLog.Util (0.9.39)
       MessagePack (>= 3.1.4)
-      Microsoft.Bcl.Memory (>= 9.0.10)
+      Microsoft.Bcl.Memory (>= 10.0.7)
       Microsoft.CodeAnalysis (>= 4.8)
       Microsoft.CodeAnalysis.CSharp (>= 4.8)
       Microsoft.CodeAnalysis.VisualBasic (>= 4.8)
-      Microsoft.Extensions.ObjectPool (>= 9.0.10)
+      Microsoft.Extensions.ObjectPool (>= 10.0.7)
-      MSBuild.StructuredLogger (>= 2.3.71)
+      MSBuild.StructuredLogger (>= 2.3.178)
-      NaturalSort.Extension (>= 4.4)
-      NuGet.Versioning (>= 6.14)
     Humanizer.Core (3.0.10)
-    MessagePack (3.1.4)
+    MessagePack (3.1.6)
-      MessagePack.Annotations (>= 3.1.4)
+      MessagePack.Annotations (>= 3.1.6)
-      MessagePackAnalyzer (>= 3.1.4)
+      MessagePackAnalyzer (>= 3.1.6)
       Microsoft.NET.StringTools (>= 17.11.4)
-    MessagePack.Annotations (3.1.4)
+    MessagePack.Annotations (3.1.6)
-    MessagePackAnalyzer (3.1.4)
+    MessagePackAnalyzer (3.1.6)
     Microsoft.Bcl.AsyncInterfaces (10.0.8)
     Microsoft.Bcl.Memory (10.0.8)
-    Microsoft.Build (18.0.2)
+    Microsoft.Build (18.6.3)
-      Microsoft.Build.Framework (>= 18.0.2)
+      Microsoft.Build.Framework (>= 18.6.3)
-      Microsoft.NET.StringTools (>= 18.0.2)
+      System.Configuration.ConfigurationManager (>= 10.0.3)
-      System.Configuration.ConfigurationManager (>= 9.0)
+      System.Diagnostics.EventLog (>= 10.0.3)
-      System.Diagnostics.EventLog (>= 9.0)
+      System.Reflection.MetadataLoadContext (>= 10.0.3)
-      System.Reflection.MetadataLoadContext (>= 9.0)
+      System.Security.Cryptography.ProtectedData (>= 10.0.3)
-      System.Security.Cryptography.ProtectedData (>= 9.0.6)
+    Microsoft.Build.Framework (18.6.3)
-    Microsoft.Build.Framework (18.4)
+      Microsoft.NET.StringTools (>= 18.6.3)
-    Microsoft.Build.Utilities.Core (18.4)
+    Microsoft.Build.Utilities.Core (18.6.3)
-      Microsoft.Build.Framework (>= 18.4)
+      Microsoft.Build.Framework (>= 18.6.3)
-      Microsoft.NET.StringTools (>= 18.4)
+      System.Configuration.ConfigurationManager (>= 10.0.3)
-      System.Configuration.ConfigurationManager (>= 10.0.1)
+      System.Diagnostics.EventLog (>= 10.0.3)
-      System.Diagnostics.EventLog (>= 10.0.1)
+      System.Security.Cryptography.ProtectedData (>= 10.0.3)
-      System.Security.Cryptography.ProtectedData (>= 10.0.1)
+    Microsoft.CodeAnalysis (5.3)
-    Microsoft.CodeAnalysis (5.0)
       Humanizer.Core (>= 2.14.1)
       Microsoft.Bcl.AsyncInterfaces (>= 9.0)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.CSharp.Workspaces (5.0)
+      Microsoft.CodeAnalysis.CSharp.Workspaces (5.3)
-      Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.0)
+      Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.3)
       System.Buffers (>= 4.6)
       System.Collections.Immutable (>= 9.0)
       System.Composition (>= 9.0)
@@ -54,36 +51,36 @@ NUGET
       System.Threading.Channels (>= 8.0)
       System.Threading.Tasks.Extensions (>= 4.6)
     Microsoft.CodeAnalysis.Analyzers (5.3)
-    Microsoft.CodeAnalysis.Common (5.0)
+    Microsoft.CodeAnalysis.Common (5.3)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-    Microsoft.CodeAnalysis.CSharp (5.0)
+    Microsoft.CodeAnalysis.CSharp (5.3)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.Common (5.0)
+      Microsoft.CodeAnalysis.Common (5.3)
-    Microsoft.CodeAnalysis.CSharp.Workspaces (5.0)
+    Microsoft.CodeAnalysis.CSharp.Workspaces (5.3)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.Common (5.0)
+      Microsoft.CodeAnalysis.Common (5.3)
-      Microsoft.CodeAnalysis.CSharp (5.0)
+      Microsoft.CodeAnalysis.CSharp (5.3)
-      Microsoft.CodeAnalysis.Workspaces.Common (5.0)
+      Microsoft.CodeAnalysis.Workspaces.Common (5.3)
       System.Composition (>= 9.0)
-    Microsoft.CodeAnalysis.VisualBasic (5.0)
+    Microsoft.CodeAnalysis.VisualBasic (5.3)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.Common (5.0)
+      Microsoft.CodeAnalysis.Common (5.3)
-    Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.0)
+    Microsoft.CodeAnalysis.VisualBasic.Workspaces (5.3)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.Common (5.0)
+      Microsoft.CodeAnalysis.Common (5.3)
-      Microsoft.CodeAnalysis.VisualBasic (5.0)
+      Microsoft.CodeAnalysis.VisualBasic (5.3)
-      Microsoft.CodeAnalysis.Workspaces.Common (5.0)
+      Microsoft.CodeAnalysis.Workspaces.Common (5.3)
       System.Composition (>= 9.0)
-    Microsoft.CodeAnalysis.Workspaces.Common (5.0)
+    Microsoft.CodeAnalysis.Workspaces.Common (5.3)
       Humanizer.Core (>= 2.14.1)
-      Microsoft.CodeAnalysis.Analyzers (>= 3.11)
+      Microsoft.CodeAnalysis.Analyzers (>= 5.3.0-2.25625.1)
-      Microsoft.CodeAnalysis.Common (5.0)
+      Microsoft.CodeAnalysis.Common (5.3)
       System.Composition (>= 9.0)
     Microsoft.CodeCoverage (18.5.1)
     Microsoft.Extensions.ObjectPool (10.0.8)
-    Microsoft.NET.StringTools (18.4)
+    Microsoft.NET.StringTools (18.6.3)
     Microsoft.NET.Test.Sdk (18.5.1)
       Microsoft.CodeCoverage (>= 18.5.1)
       Microsoft.TestPlatform.TestHost (>= 18.5.1)
@@ -97,7 +94,6 @@ 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: 1.7.68
+version: 1.7.69-dev
 groups:
   - csharp
   - solorigate

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

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

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

@@ -22,7 +22,6 @@
 | [...]/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

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

csharp/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/csharp-all
-version: 6.0.2
+version: 6.0.3-dev
 groups: csharp
 dbscheme: semmlecode.csharp.dbscheme
 extractor: csharp

csharp/ql/lib/semmle/code/csharp/exprs/Call.qll

@@ -766,7 +766,16 @@ class PropertyCall extends AccessorCall, PropertyAccessExpr {
   }
 
   override Accessor getWriteTarget() {
-    this instanceof AssignableWrite and result = this.getProperty().getSetter()
+    this instanceof AssignableWrite and
+    exists(Property p | p = this.getProperty() |
+      result = p.getSetter()
+      or
+      result =
+        any(Getter g |
+          g = p.getGetter() and
+          g.getAnnotatedReturnType().isRef()
+        )
+    )
   }
 
   override Expr getArgument(int i) {
@@ -801,7 +810,16 @@ class IndexerCall extends AccessorCall, IndexerAccessExpr {
   }
 
   override Accessor getWriteTarget() {
-    this instanceof AssignableWrite and result = this.getIndexer().getSetter()
+    this instanceof AssignableWrite and
+    exists(Indexer i | i = this.getIndexer() |
+      result = i.getSetter()
+      or
+      result =
+        any(Getter g |
+          g = i.getGetter() and
+          g.getAnnotatedReturnType().isRef()
+        )
+    )
   }
 
   override Expr getArgument(int i) {

csharp/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/csharp-queries
-version: 1.7.4
+version: 1.7.5-dev
 groups:
   - csharp
   - queries

csharp/ql/test/library-tests/csharp8/NullableRefTypes.expected

@@ -227,7 +227,7 @@ returnTypes
 | NullableRefTypes.cs:107:26:107:36 | ReturnsRef5 | readonly MyClass! |
 | NullableRefTypes.cs:108:26:108:36 | ReturnsRef6 | readonly MyClass! |
 | NullableRefTypes.cs:110:10:110:20 | Parameters1 | Void! |
-| NullableRefTypes.cs:113:32:113:44 | get_RefProperty | MyClass! |
+| NullableRefTypes.cs:113:32:113:44 | get_RefProperty | ref MyClass! |
 | NullableRefTypes.cs:116:7:116:23 | <object initializer> | Void |
 | NullableRefTypes.cs:116:7:116:23 | ToStringWithTypes | Void! |
 | NullableRefTypes.cs:136:7:136:24 | <object initializer> | Void |

csharp/ql/test/library-tests/encoding/SBCS.cs

@@ -1,4 +1,4 @@
-class SBCS
+class SBCS
 {
-    string sbcs = "<22>";
+    string sbcs = "<22>";
 }

csharp/ql/test/library-tests/indexers/Indexers13.expected

@@ -0,0 +1,4 @@
+| indexers.cs:24:21:24:24 | Item | indexers.cs:62:22:62:29 | access to indexer | indexers.cs:26:13:26:15 | get_Item |
+| indexers.cs:24:21:24:24 | Item | indexers.cs:65:25:65:32 | access to indexer | indexers.cs:34:13:34:15 | set_Item |
+| indexers.cs:143:24:143:27 | Item | indexers.cs:156:13:156:16 | access to indexer | indexers.cs:145:13:145:15 | get_Item |
+| indexers.cs:143:24:143:27 | Item | indexers.cs:157:21:157:24 | access to indexer | indexers.cs:145:13:145:15 | get_Item |

csharp/ql/test/library-tests/indexers/Indexers13.ql

@@ -0,0 +1,8 @@
+import csharp
+
+from IndexerCall ic, Indexer i, Accessor target
+where
+  ic.getIndexer() = i and
+  ic.getTarget() = target and
+  i.fromSource()
+select i, ic, target

csharp/ql/test/library-tests/indexers/PrintAst.expected

@@ -360,3 +360,57 @@ indexers.cs:
 #  130|         4: [BlockStmt] {...}
 #  130|           0: [ReturnStmt] return ...;
 #  130|             0: [IntLiteral] 0
+#  134|   5: [RefStruct] S
+#  136|     6: [Field] x
+#  136|       -1: [TypeMention] int
+#  138|     7: [InstanceConstructor] S
+#-----|       2: (Parameters)
+#  138|         0: [Parameter] v
+#  138|           -1: [TypeMention] int
+#  139|       4: [BlockStmt] {...}
+#  140|         0: [ExprStmt] ...;
+#  140|           0: [AssignExpr] ... = ...
+#  140|             0: [FieldAccess] access to field x
+#  140|             1: [RefExpr] ref ...
+#  140|               0: [ParameterAccess] access to parameter v
+#  143|     8: [Indexer] Item
+#  143|       -1: [TypeMention] int
+#-----|       1: (Parameters)
+#  143|         0: [Parameter] i
+#  143|           -1: [TypeMention] int
+#  145|       3: [Getter] get_Item
+#-----|         2: (Parameters)
+#  143|           0: [Parameter] i
+#  145|         4: [BlockStmt] {...}
+#  145|           0: [ReturnStmt] return ...;
+#  145|             0: [RefExpr] ref ...
+#  145|               0: [FieldAccess] access to field x
+#  149|   6: [Class] TestRefReturns
+#  151|     6: [Method] M
+#  151|       -1: [TypeMention] Void
+#  152|       4: [BlockStmt] {...}
+#  153|         0: [LocalVariableDeclStmt] ... ...;
+#  153|           0: [LocalVariableDeclAndInitExpr] Int32 a = ...
+#  153|             -1: [TypeMention] int
+#  153|             0: [LocalVariableAccess] access to local variable a
+#  153|             1: [IntLiteral] 0
+#  155|         1: [LocalVariableDeclStmt] ... ...;
+#  155|           0: [LocalVariableDeclAndInitExpr] S s = ...
+#  155|             -1: [TypeMention] S
+#  155|             0: [LocalVariableAccess] access to local variable s
+#  155|             1: [ObjectCreation] object creation of type S
+#  155|               -1: [TypeMention] S
+#  155|               0: [LocalVariableAccess] access to local variable a
+#  156|         2: [ExprStmt] ...;
+#  156|           0: [AssignExpr] ... = ...
+#  156|             0: [IndexerCall] access to indexer
+#  156|               -1: [LocalVariableAccess] access to local variable s
+#  156|               0: [IntLiteral] 0
+#  156|             1: [IntLiteral] 1
+#  157|         3: [LocalVariableDeclStmt] ... ...;
+#  157|           0: [LocalVariableDeclAndInitExpr] Int32 x = ...
+#  157|             -1: [TypeMention] int
+#  157|             0: [LocalVariableAccess] access to local variable x
+#  157|             1: [IndexerCall] access to indexer
+#  157|               -1: [LocalVariableAccess] access to local variable s
+#  157|               0: [IntLiteral] 0

csharp/ql/test/library-tests/indexers/indexers.cs

@@ -130,4 +130,31 @@ namespace Indexers
             get { return 0; }
         }
     }
+
+    public ref struct S
+    {
+        private ref int x;
+
+        public S(ref int v)
+        {
+            x = ref v;
+        }
+
+        public ref int this[int i]
+        {
+            get { return ref x; }
+        }
+    }
+
+    public class TestRefReturns
+    {
+        public void M()
+        {
+            int a = 0;
+
+            S s = new S(ref a);
+            s[0] = 1;
+            var x = s[0];
+        }
+    }
 }

csharp/ql/test/library-tests/properties/PrintAst.expected

@@ -246,3 +246,50 @@ properties.cs:
 #  133|               0: [FieldAccess] access to field Prop.field
 #  133|               1: [ParameterAccess] access to parameter value
 #  130|     7: [Field] Prop.field
+#  137|   11: [RefStruct] S
+#  139|     6: [Field] x
+#  139|       -1: [TypeMention] int
+#  141|     7: [InstanceConstructor] S
+#-----|       2: (Parameters)
+#  141|         0: [Parameter] v
+#  141|           -1: [TypeMention] int
+#  142|       4: [BlockStmt] {...}
+#  143|         0: [ExprStmt] ...;
+#  143|           0: [AssignExpr] ... = ...
+#  143|             0: [FieldAccess] access to field x
+#  143|             1: [RefExpr] ref ...
+#  143|               0: [ParameterAccess] access to parameter v
+#  146|     8: [Property] Prop
+#  146|       -1: [TypeMention] int
+#  148|       3: [Getter] get_Prop
+#  148|         4: [BlockStmt] {...}
+#  148|           0: [ReturnStmt] return ...;
+#  148|             0: [RefExpr] ref ...
+#  148|               0: [FieldAccess] access to field x
+#  152|   12: [Class] TestRefReturns
+#  154|     6: [Method] M
+#  154|       -1: [TypeMention] Void
+#  155|       4: [BlockStmt] {...}
+#  156|         0: [LocalVariableDeclStmt] ... ...;
+#  156|           0: [LocalVariableDeclAndInitExpr] Int32 a = ...
+#  156|             -1: [TypeMention] int
+#  156|             0: [LocalVariableAccess] access to local variable a
+#  156|             1: [IntLiteral] 0
+#  158|         1: [LocalVariableDeclStmt] ... ...;
+#  158|           0: [LocalVariableDeclAndInitExpr] S s = ...
+#  158|             -1: [TypeMention] S
+#  158|             0: [LocalVariableAccess] access to local variable s
+#  158|             1: [ObjectCreation] object creation of type S
+#  158|               -1: [TypeMention] S
+#  158|               0: [LocalVariableAccess] access to local variable a
+#  159|         2: [ExprStmt] ...;
+#  159|           0: [AssignExpr] ... = ...
+#  159|             0: [PropertyCall] access to property Prop
+#  159|               -1: [LocalVariableAccess] access to local variable s
+#  159|             1: [IntLiteral] 1
+#  160|         3: [LocalVariableDeclStmt] ... ...;
+#  160|           0: [LocalVariableDeclAndInitExpr] Int32 x = ...
+#  160|             -1: [TypeMention] int
+#  160|             0: [LocalVariableAccess] access to local variable x
+#  160|             1: [PropertyCall] access to property Prop
+#  160|               -1: [LocalVariableAccess] access to local variable s

csharp/ql/test/library-tests/properties/Properties17.expected

@@ -1,5 +1,6 @@
 | Prop.field |
 | caption |
 | next |
+| x |
 | y |
 | z |

csharp/ql/test/library-tests/properties/Properties19.expected

@@ -0,0 +1,8 @@
+| properties.cs:12:23:12:29 | Caption | properties.cs:29:13:29:28 | access to property Caption | properties.cs:17:13:17:15 | set_Caption |
+| properties.cs:12:23:12:29 | Caption | properties.cs:30:24:30:39 | access to property Caption | properties.cs:15:13:15:15 | get_Caption |
+| properties.cs:57:20:57:20 | X | properties.cs:61:13:61:13 | access to property X | properties.cs:57:37:57:39 | set_X |
+| properties.cs:58:20:58:20 | Y | properties.cs:62:13:62:13 | access to property Y | properties.cs:58:37:58:39 | set_Y |
+| properties.cs:70:28:70:28 | X | properties.cs:82:46:82:51 | access to property X | properties.cs:70:32:70:34 | get_X |
+| properties.cs:71:28:71:28 | Y | properties.cs:83:39:83:44 | access to property Y | properties.cs:74:13:74:15 | set_Y |
+| properties.cs:146:24:146:27 | Prop | properties.cs:159:13:159:18 | access to property Prop | properties.cs:148:13:148:15 | get_Prop |
+| properties.cs:146:24:146:27 | Prop | properties.cs:160:21:160:26 | access to property Prop | properties.cs:148:13:148:15 | get_Prop |

csharp/ql/test/library-tests/properties/Properties19.ql

@@ -0,0 +1,8 @@
+import csharp
+
+from PropertyCall pc, Property p, Accessor target
+where
+  pc.getProperty() = p and
+  pc.getTarget() = target and
+  p.fromSource()
+select p, pc, target

csharp/ql/test/library-tests/properties/properties.cs

@@ -133,4 +133,31 @@ namespace Properties
             set { field = value; }
         }
     }
+
+    public ref struct S
+    {
+        private ref int x;
+
+        public S(ref int v)
+        {
+            x = ref v;
+        }
+
+        public ref int Prop
+        {
+            get { return ref x; }
+        }
+    }
+
+    public class TestRefReturns
+    {
+        public void M()
+        {
+            int a = 0;
+
+            S s = new S(ref a);
+            s.Prop = 1;
+            var x = s.Prop;
+        }
+    }
 }

csharp/ql/test/query-tests/Telemetry/DatabaseQuality/IsNotOkayCall.expected

@@ -1,3 +1,2 @@
 | Quality.cs:26:19:26:26 | access to indexer | Call without target $@. | Quality.cs:26:19:26:26 | access to indexer | access to indexer |
 | Quality.cs:29:21:29:27 | access to indexer | Call without target $@. | Quality.cs:29:21:29:27 | access to indexer | access to indexer |
-| Quality.cs:32:9:32:21 | access to indexer | Call without target $@. | Quality.cs:32:9:32:21 | access to indexer | access to indexer |

csharp/ql/test/query-tests/Telemetry/DatabaseQuality/NoTarget.expected

@@ -9,6 +9,5 @@
 | Quality.cs:23:9:23:30 | delegate call | Call without target $@. | Quality.cs:23:9:23:30 | delegate call | delegate call |
 | Quality.cs:26:19:26:26 | access to indexer | Call without target $@. | Quality.cs:26:19:26:26 | access to indexer | access to indexer |
 | Quality.cs:29:21:29:27 | access to indexer | Call without target $@. | Quality.cs:29:21:29:27 | access to indexer | access to indexer |
-| Quality.cs:32:9:32:21 | access to indexer | Call without target $@. | Quality.cs:32:9:32:21 | access to indexer | access to indexer |
 | Quality.cs:38:16:38:26 | access to property MyProperty2 | Call without target $@. | Quality.cs:38:16:38:26 | access to property MyProperty2 | access to property MyProperty2 |
 | Quality.cs:50:20:50:26 | object creation of type T | Call without target $@. | Quality.cs:50:20:50:26 | object creation of type T | object creation of type T |

csharp/ql/test/query-tests/Telemetry/DatabaseQuality/Quality.cs

@@ -29,7 +29,7 @@ public class Test
         var slice = sp[..3];        // TODO: this is not an indexer call, but rather a `sp.Slice(0, 3)` call.
 
         Span<byte> guidBytes = stackalloc byte[16];
-        guidBytes[08] = 1;          // TODO: this indexer call has no target, because the target is a `ref` returning getter.
+        guidBytes[08] = 1;
 
         new MyList([new(), new Test()]);
     }

go/ql/consistency-queries/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql-go-consistency-queries
-version: 1.0.51
+version: 1.0.52-dev
 groups:
   - go
   - queries

go/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/go-all
-version: 7.1.2
+version: 7.1.3-dev
 groups: go
 dbscheme: go.dbscheme
 extractor: go

go/ql/src/qlpack.yml

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

java/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/java-all
-version: 9.1.2
+version: 9.1.3-dev
 groups: java
 dbscheme: config/semmlecode.dbscheme
 extractor: java

java/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/java-queries
-version: 1.11.4
+version: 1.11.5-dev
 groups:
   - java
   - queries

javascript/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/javascript-all
-version: 2.7.2
+version: 2.7.3-dev
 groups: javascript
 dbscheme: semmlecode.javascript.dbscheme
 extractor: javascript

javascript/ql/src/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/javascript-queries
-version: 2.3.11
+version: 2.3.12-dev
 groups:
   - javascript
   - queries

misc/suite-helpers/qlpack.yml

@@ -1,4 +1,4 @@
 name: codeql/suite-helpers
-version: 1.0.51
+version: 1.0.52-dev
 groups: shared
 warnOnImplicitThis: true

python/ql/lib/LegacyPointsTo.qll

@@ -213,9 +213,11 @@ class ExprWithPointsTo extends Expr {
    * Gets what this expression might "refer-to" in the given `context`.
    */
   predicate refersTo(Context context, Object obj, ClassObject cls, AstNode origin) {
-    this.getAFlowNode()
+    exists(ControlFlowNode this_, ControlFlowNode origin_ |
-        .(ControlFlowNodeWithPointsTo)
+      this_.getNode() = this and origin_.getNode() = origin
-        .refersTo(context, obj, cls, origin.getAFlowNode())
+    |
+      this_.(ControlFlowNodeWithPointsTo).refersTo(context, obj, cls, origin_)
+    )
   }
 
   /**
@@ -226,7 +228,11 @@ class ExprWithPointsTo extends Expr {
    */
   pragma[nomagic]
   predicate refersTo(Object obj, AstNode origin) {
-    this.getAFlowNode().(ControlFlowNodeWithPointsTo).refersTo(obj, origin.getAFlowNode())
+    exists(ControlFlowNode this_, ControlFlowNode origin_ |
+      this_.getNode() = this and origin_.getNode() = origin
+    |
+      this_.(ControlFlowNodeWithPointsTo).refersTo(obj, origin_)
+    )
   }
 
   /**
@@ -240,16 +246,22 @@ class ExprWithPointsTo extends Expr {
    * in the given `context`.
    */
   predicate pointsTo(Context context, Value value, AstNode origin) {
-    this.getAFlowNode()
+    exists(ControlFlowNode this_, ControlFlowNode origin_ |
-        .(ControlFlowNodeWithPointsTo)
+      this_.getNode() = this and origin_.getNode() = origin
-        .pointsTo(context, value, origin.getAFlowNode())
+    |
+      this_.(ControlFlowNodeWithPointsTo).pointsTo(context, value, origin_)
+    )
   }
 
   /**
    * Holds if this expression might "point-to" to `value` which is from `origin`.
    */
   predicate pointsTo(Value value, AstNode origin) {
-    this.getAFlowNode().(ControlFlowNodeWithPointsTo).pointsTo(value, origin.getAFlowNode())
+    exists(ControlFlowNode this_, ControlFlowNode origin_ |
+      this_.getNode() = this and origin_.getNode() = origin
+    |
+      this_.(ControlFlowNodeWithPointsTo).pointsTo(value, origin_)
+    )
   }
 
   /**
@@ -475,7 +487,10 @@ class FunctionMetricsWithPointsTo extends FunctionMetrics {
     not non_coupling_method(result) and
     exists(Call call | call.getScope() = this |
       exists(FunctionObject callee | callee.getFunction() = result |
-        call.getAFlowNode().getFunction().(ControlFlowNodeWithPointsTo).refersTo(callee)
+        exists(CallNode call_ |
+          call_.getNode() = call and
+          call_.getFunction().(ControlFlowNodeWithPointsTo).refersTo(callee)
+        )
       )
       or
       exists(Attribute a | call.getFunc() = a |

python/ql/lib/analysis/DefinitionTracking.qll

@@ -64,7 +64,7 @@ private predicate jump_to_defn(ControlFlowNode use, Definition defn) {
 private predicate preferred_jump_to_defn(Expr use, Definition def) {
   not use instanceof ClassExpr and
   not use instanceof FunctionExpr and
-  jump_to_defn(use.getAFlowNode(), def)
+  exists(ControlFlowNode useNode | useNode.getNode() = use | jump_to_defn(useNode, def))
 }
 
 private predicate unique_jump_to_defn(Expr use, Definition def) {
@@ -452,7 +452,7 @@ private predicate self_parameter_jump_to_defn_attribute(
  * This exists primarily for testing use `getPreferredDefinition()` instead.
  */
 Definition getADefinition(Expr use) {
-  jump_to_defn(use.getAFlowNode(), result) and
+  exists(ControlFlowNode useNode | useNode.getNode() = use | jump_to_defn(useNode, result)) and
   not use instanceof Call and
   not use.isArtificial() and
   // Not the use itself

python/ql/lib/change-notes/2026-05-19-deprecate-getAFlowNode.md

@@ -0,0 +1,5 @@
+---
+category: deprecated
+---
+* The `AstNode.getAFlowNode()` predicate has been deprecated. Use `ControlFlowNode.getNode()` from the other direction instead: replace `e.getAFlowNode() = n` with `n.getNode() = e`. This is a preparatory step towards migrating the dataflow library off the legacy CFG; it has no semantic effect.
+

python/ql/lib/change-notes/2026-06-01-decorator-predicate-simplification.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Simplified the internal predicates that detect `@staticmethod`, `@classmethod` and `@property` decorators to match the decorator's AST `Name` directly, rather than going through the CFG and requiring the name to resolve globally. Code that shadows these three builtin decorators at the module-scope will now be classified by the decorator name alone; in practice, shadowing these names is extremely rare and the call-graph results are unchanged.

python/ql/lib/change-notes/2026-06-01-deprecate-getAReturnValueFlowNode.md

@@ -0,0 +1,4 @@
+---
+category: deprecated
+---
+* The `Function.getAReturnValueFlowNode()` predicate has been deprecated. Bind a `Return` node explicitly instead — `exists(Return ret | ret.getScope() = f and n.getNode() = ret.getValue())`. This is a preparatory step towards migrating the dataflow library off the legacy CFG; it has no semantic effect.

python/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/python-all
-version: 7.1.2
+version: 7.1.3-dev
 groups: python
 dbscheme: semmlecode.python.dbscheme
 extractor: python

python/ql/lib/semmle/python/AstExtended.qll

@@ -16,21 +16,26 @@ abstract class AstNode extends AstNode_ {
   /** Gets the scope that this node occurs in */
   abstract Scope getScope();
 
-  /**
-   * Gets a flow node corresponding directly to this node.
-   * NOTE: For some statements and other purely syntactic elements,
-   * there may not be a `ControlFlowNode`
-   */
-  cached
-  ControlFlowNode getAFlowNode() {
-    Stages::AST::ref() and
-    py_flow_bb_node(result, this, _, _)
-  }
-
   /** Gets the location for this AST node */
   cached
   Location getLocation() { none() }
 
+  /**
+   * DEPRECATED: use `ControlFlowNode.getNode()` from the other direction instead;
+   * that is, replace `e.getAFlowNode() = n` with `n.getNode() = e`. This API is
+   * being removed to untangle the AST and CFG hierarchies in preparation for
+   * migrating the dataflow library off the legacy CFG.
+   *
+   * Gets a flow node corresponding directly to this node.
+   * NOTE: For some statements and other purely syntactic elements,
+   * there may not be a `ControlFlowNode`.
+   */
+  cached
+  deprecated ControlFlowNode getAFlowNode() {
+    Stages::AST::ref() and
+    py_flow_bb_node(result, this, _, _)
+  }
+
   /**
    * Whether this syntactic element is artificial, that is it is generated
    * by the compiler and is not present in the source

python/ql/lib/semmle/python/Exprs.qll

@@ -28,7 +28,9 @@ class Expr extends Expr_, AstNode {
   /** Whether this expression may have a side effect (as determined purely from its syntax) */
   predicate hasSideEffects() {
     /* If an exception raised by this expression handled, count that as a side effect */
-    this.getAFlowNode().getASuccessor().getNode() instanceof ExceptStmt
+    exists(ControlFlowNode n | n.getNode() = this |
+      n.getASuccessor().getNode() instanceof ExceptStmt
+    )
     or
     this.getASubExpression().hasSideEffects()
   }
@@ -68,8 +70,6 @@ class Attribute extends Attribute_ {
   /* syntax: Expr.name */
   override Expr getASubExpression() { result = this.getObject() }
 
-  override AttrNode getAFlowNode() { result = super.getAFlowNode() }
-
   /** Gets the name of this attribute. That is the `name` in `obj.name` */
   string getName() { result = Attribute_.super.getAttr() }
 
@@ -96,8 +96,6 @@ class Subscript extends Subscript_ {
   }
 
   Expr getObject() { result = Subscript_.super.getValue() }
-
-  override SubscriptNode getAFlowNode() { result = super.getAFlowNode() }
 }
 
 /** A call expression, such as `func(...)` */
@@ -113,8 +111,6 @@ class Call extends Call_ {
 
   override string toString() { result = this.getFunc().toString() + "()" }
 
-  override CallNode getAFlowNode() { result = super.getAFlowNode() }
-
   /** Gets a tuple (*) argument of this call. */
   Expr getStarargs() { result = this.getAPositionalArg().(Starred).getValue() }
 
@@ -200,8 +196,6 @@ class IfExp extends IfExp_ {
   override Expr getASubExpression() {
     result = this.getTest() or result = this.getBody() or result = this.getOrelse()
   }
-
-  override IfExprNode getAFlowNode() { result = super.getAFlowNode() }
 }
 
 /** A starred expression, such as the `*rest` in the assignment `first, *rest = seq` */
@@ -410,8 +404,6 @@ class PlaceHolder extends PlaceHolder_ {
   override Expr getASubExpression() { none() }
 
   override string toString() { result = "$" + this.getId() }
-
-  override NameNode getAFlowNode() { result = super.getAFlowNode() }
 }
 
 /** A tuple expression such as `( 1, 3, 5, 7, 9 )` */
@@ -478,8 +470,6 @@ class Name extends Name_ {
 
   override string toString() { result = this.getId() }
 
-  override NameNode getAFlowNode() { result = super.getAFlowNode() }
-
   override predicate isArtificial() {
     /* Artificial variable names in comprehensions all start with "." */
     this.getId().charAt(0) = "."
@@ -585,8 +575,6 @@ abstract class NameConstant extends Name, ImmutableLiteral {
 
   override predicate isConstant() { any() }
 
-  override NameConstantNode getAFlowNode() { result = Name.super.getAFlowNode() }
-
   override predicate isArtificial() { none() }
 }
 

python/ql/lib/semmle/python/Flow.qll

@@ -555,27 +555,27 @@ class DefinitionNode extends ControlFlowNode {
   cached
   DefinitionNode() {
     Stages::AST::ref() and
-    exists(Assign a | a.getATarget().getAFlowNode() = this)
+    exists(Assign a | this.getNode() = a.getATarget())
     or
-    exists(AssignExpr a | a.getTarget().getAFlowNode() = this)
+    exists(AssignExpr a | this.getNode() = a.getTarget())
     or
-    exists(AnnAssign a | a.getTarget().getAFlowNode() = this and exists(a.getValue()))
+    exists(AnnAssign a | this.getNode() = a.getTarget() and exists(a.getValue()))
     or
-    exists(Alias a | a.getAsname().getAFlowNode() = this)
+    exists(Alias a | this.getNode() = a.getAsname())
     or
     augstore(_, this)
     or
     // `x, y = 1, 2` where LHS is a combination of list or tuples
-    exists(Assign a | list_or_tuple_nested_element(a.getATarget()).getAFlowNode() = this)
+    exists(Assign a | this.getNode() = list_or_tuple_nested_element(a.getATarget()))
     or
-    exists(For for | for.getTarget().getAFlowNode() = this)
+    exists(For for | this.getNode() = for.getTarget())
     or
-    exists(Parameter param | this = param.asName().getAFlowNode() and exists(param.getDefault()))
+    exists(Parameter param | this.getNode() = param.asName() and exists(param.getDefault()))
   }
 
   /** flow node corresponding to the value assigned for the definition corresponding to this flow node */
   ControlFlowNode getValue() {
-    result = assigned_value(this.getNode()).getAFlowNode() and
+    result.getNode() = assigned_value(this.getNode()) and
     (
       result.getBasicBlock().dominates(this.getBasicBlock())
       or
@@ -584,7 +584,7 @@ class DefinitionNode extends ControlFlowNode {
       // since the default value for a parameter is evaluated in the same basic block as
       // the function definition, but the parameter belongs to the basic block of the function,
       // there is no dominance relationship between the two.
-      exists(Parameter param | this = param.asName().getAFlowNode())
+      exists(Parameter param | this.getNode() = param.asName())
     )
   }
 }
@@ -901,7 +901,7 @@ class ExceptFlowNode extends ControlFlowNode {
     exists(ExceptStmt ex |
       this.getBasicBlock().dominates(result.getBasicBlock()) and
       ex = this.getNode() and
-      result = ex.getType().getAFlowNode()
+      result.getNode() = ex.getType()
     )
   }
 
@@ -913,7 +913,7 @@ class ExceptFlowNode extends ControlFlowNode {
     exists(ExceptStmt ex |
       this.getBasicBlock().dominates(result.getBasicBlock()) and
       ex = this.getNode() and
-      result = ex.getName().getAFlowNode()
+      result.getNode() = ex.getName()
     )
   }
 }
@@ -928,7 +928,7 @@ class ExceptGroupFlowNode extends ControlFlowNode {
    */
   ControlFlowNode getType() {
     this.getBasicBlock().dominates(result.getBasicBlock()) and
-    result = this.getNode().(ExceptGroupStmt).getType().getAFlowNode()
+    result.getNode() = this.getNode().(ExceptGroupStmt).getType()
   }
 
   /**
@@ -937,7 +937,7 @@ class ExceptGroupFlowNode extends ControlFlowNode {
    */
   ControlFlowNode getName() {
     this.getBasicBlock().dominates(result.getBasicBlock()) and
-    result = this.getNode().(ExceptGroupStmt).getName().getAFlowNode()
+    result.getNode() = this.getNode().(ExceptGroupStmt).getName()
   }
 }
 

python/ql/lib/semmle/python/Function.qll

@@ -153,8 +153,16 @@ class Function extends Function_, Scope, AstNode {
 
   override predicate contains(AstNode inner) { Scope.super.contains(inner) }
 
-  /** Gets a control flow node for a return value of this function */
+  /**
-  ControlFlowNode getAReturnValueFlowNode() {
+   * DEPRECATED: bind a `Return` node explicitly instead, e.g.
+   * `exists(Return ret | ret.getScope() = this and n.getNode() = ret.getValue())`.
+   * This API is being phased out together with `AstNode.getAFlowNode()` to
+   * untangle the AST and CFG hierarchies in preparation for migrating the
+   * dataflow library off the legacy CFG.
+   *
+   * Gets a control flow node for a return value of this function.
+   */
+  deprecated ControlFlowNode getAReturnValueFlowNode() {
     exists(Return ret |
       ret.getScope() = this and
       ret.getValue() = result.getNode()

python/ql/lib/semmle/python/Import.qll

@@ -162,8 +162,6 @@ class ImportMember extends ImportMember_ {
   string getImportedModuleName() {
     result = this.getModule().(ImportExpr).getImportedModuleName() + "." + this.getName()
   }
-
-  override ImportMemberNode getAFlowNode() { result = super.getAFlowNode() }
 }
 
 /** An import statement */

python/ql/lib/semmle/python/SelfAttribute.qll

@@ -46,20 +46,23 @@ class SelfAttributeRead extends SelfAttribute {
   }
 
   predicate guardedByHasattr() {
-    exists(Variable var, ControlFlowNode n |
+    exists(Variable var, ControlFlowNode n, ControlFlowNode this_, ControlFlowNode obj_ |
-      var.getAUse() = this.getObject().getAFlowNode() and
+      this_.getNode() = this and obj_.getNode() = this.getObject()
+    |
+      var.getAUse() = obj_ and
       hasattr(n, var.getAUse(), this.getName()) and
-      n.strictlyDominates(this.getAFlowNode())
+      n.strictlyDominates(this_)
     )
   }
 
   pragma[noinline]
   predicate locallyDefined() {
-    exists(SelfAttributeStore store |
+    exists(SelfAttributeStore store, ControlFlowNode store_, ControlFlowNode this_ |
-      this.getName() = store.getName() and
+      store_.getNode() = store and this_.getNode() = this
-      this.getScope() = store.getScope()
     |
-      store.getAFlowNode().strictlyDominates(this.getAFlowNode())
+      this.getName() = store.getName() and
+      this.getScope() = store.getScope() and
+      store_.strictlyDominates(this_)
     )
   }
 }

python/ql/lib/semmle/python/dataflow/new/BarrierGuards.qll

@@ -5,24 +5,30 @@ private import semmle.python.dataflow.new.DataFlow
 
 private predicate constCompare(DataFlow::GuardNode g, ControlFlowNode node, boolean branch) {
   exists(CompareNode cn | cn = g |
-    exists(ImmutableLiteral const, Cmpop op |
+    exists(ImmutableLiteral const, Cmpop op, ControlFlowNode c |
-      op = any(Eq eq) and branch = true
+      c.getNode() = const and
-      or
+      (
-      op = any(NotEq ne) and branch = false
+        op = any(Eq eq) and branch = true
+        or
+        op = any(NotEq ne) and branch = false
+      )
     |
-      cn.operands(const.getAFlowNode(), op, node)
+      cn.operands(c, op, node)
       or
-      cn.operands(node, op, const.getAFlowNode())
+      cn.operands(node, op, c)
     )
     or
-    exists(NameConstant const, Cmpop op |
+    exists(NameConstant const, Cmpop op, ControlFlowNode c |
-      op = any(Is is_) and branch = true
+      c.getNode() = const and
-      or
+      (
-      op = any(IsNot isn) and branch = false
+        op = any(Is is_) and branch = true
+        or
+        op = any(IsNot isn) and branch = false
+      )
     |
-      cn.operands(const.getAFlowNode(), op, node)
+      cn.operands(c, op, node)
       or
-      cn.operands(node, op, const.getAFlowNode())
+      cn.operands(node, op, c)
     )
     or
     exists(IterableNode const_iterable, Cmpop op |

python/ql/lib/semmle/python/dataflow/new/internal/Attributes.qll

@@ -228,7 +228,7 @@ private class ClassDefinitionAsAttrWrite extends AttrWrite, CfgNode {
 
   override Node getValue() { result.asCfgNode() = node.getValue() }
 
-  override Node getObject() { result.asCfgNode() = cls.getAFlowNode() }
+  override Node getObject() { result.asCfgNode().getNode() = cls }
 
   override ExprNode getAttributeNameExpr() { none() }
 

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowDispatch.qll

@@ -256,9 +256,12 @@ predicate parameterMatch(ParameterPosition ppos, ArgumentPosition apos) {
  */
 overlay[local]
 predicate isStaticmethod(Function func) {
-  exists(NameNode id | id.getId() = "staticmethod" and id.isGlobal() |
+  // The decorator is *syntactically* a `Name` "staticmethod" — we don't
-    func.getADecorator() = id.getNode()
+  // care which variable it resolves to. `staticmethod` is a builtin and
-  )
+  // is almost never shadowed in a module-level scope; even if a class
+  // redefines `staticmethod` in its body, the class body has not started
+  // executing yet at the decorator position, so Python uses the builtin.
+  func.getADecorator().(Name).getId() = "staticmethod"
 }
 
 /**
@@ -268,9 +271,9 @@ predicate isStaticmethod(Function func) {
  */
 overlay[local]
 predicate isClassmethod(Function func) {
-  exists(NameNode id | id.getId() = "classmethod" and id.isGlobal() |
+  // See `isStaticmethod` for the rationale for matching on the AST `Name`
-    func.getADecorator() = id.getNode()
+  // rather than going via the CFG and `isGlobal()`.
-  )
+  func.getADecorator().(Name).getId() = "classmethod"
   or
   exists(Class cls |
     cls.getAMethod() = func and
@@ -285,9 +288,8 @@ predicate isClassmethod(Function func) {
 /** Holds if the function `func` has a `property` decorator. */
 overlay[local]
 predicate hasPropertyDecorator(Function func) {
-  exists(NameNode id | id.getId() = "property" and id.isGlobal() |
+  // See `isStaticmethod` for the rationale for matching on the AST `Name`.
-    func.getADecorator() = id.getNode()
+  func.getADecorator().(Name).getId() = "property"
-  )
 }
 
 /**
@@ -1911,8 +1913,8 @@ abstract class ReturnNode extends Node {
 class ExtractedReturnNode extends ReturnNode, CfgNode {
   // See `TaintTrackingImplementation::returnFlowStep`
   ExtractedReturnNode() {
-    node = any(Return ret).getValue().getAFlowNode() or
+    node.getNode() = any(Return ret).getValue() or
-    node = any(Yield yield).getAFlowNode()
+    node.getNode() = any(Yield yield)
   }
 
   override ReturnKind getKind() { any() }
@@ -1930,7 +1932,7 @@ class ExtractedReturnNode extends ReturnNode, CfgNode {
 class YieldNodeInContextManagerFunction extends ReturnNode, CfgNode {
   YieldNodeInContextManagerFunction() {
     hasContextmanagerDecorator(node.getScope()) and
-    node = any(Yield yield).getValue().getAFlowNode()
+    node.getNode() = any(Yield yield).getValue()
   }
 
   override ReturnKind getKind() { any() }

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowPrivate.qll

@@ -185,8 +185,8 @@ private predicate synthDictSplatArgumentNodeStoreStep(
  */
 predicate yieldStoreStep(Node nodeFrom, Content c, Node nodeTo) {
   exists(Yield yield |
-    nodeTo.asCfgNode() = yield.getAFlowNode() and
+    nodeTo.asCfgNode().getNode() = yield and
-    nodeFrom.asCfgNode() = yield.getValue().getAFlowNode() and
+    nodeFrom.asCfgNode().getNode() = yield.getValue() and
     // TODO: Consider if this will also need to transfer dictionary content
     // once dictionary comprehensions are supported.
     c instanceof ListElementContent

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowPublic.qll

@@ -485,7 +485,7 @@ class ModuleVariableNode extends Node, TModuleVariableNode {
 
   /** Gets a node that reads this variable, excluding reads that happen through `from ... import *`. */
   Node getALocalRead() {
-    result.asCfgNode() = var.getALoad().getAFlowNode() and
+    result.asCfgNode().getNode() = var.getALoad() and
     not result.getScope() = mod
   }
 

python/ql/lib/semmle/python/dataflow/new/internal/ImportResolution.qll

@@ -9,7 +9,19 @@ private import semmle.python.dataflow.new.DataFlow
 private import semmle.python.dataflow.new.internal.ImportStar
 private import semmle.python.dataflow.new.TypeTracking
 private import semmle.python.dataflow.new.internal.DataFlowPrivate
-private import semmle.python.essa.SsaDefinitions
+
+/**
+ * Holds if `init` is a package's `__init__.py` and `var` is a global variable in
+ * `init` whose name matches a submodule of the package.
+ *
+ * Inlined from `SsaSource::init_module_submodule_defn` to avoid pulling
+ * `semmle.python.essa.SsaDefinitions` into the new dataflow stack.
+ */
+private predicate initModuleSubmoduleDefn(GlobalVariable var, Module init) {
+  init.isPackageInit() and
+  exists(init.getPackage().getSubModule(var.getId())) and
+  var.getScope() = init
+}
 
 /**
  * Python modules and the way imports are resolved are... complicated. Here's a crash course in how
@@ -326,7 +338,7 @@ module ImportResolution {
     // imported yet.
     exists(string submodule, Module package, EssaVariable var |
       submodule = var.getName() and
-      SsaSource::init_module_submodule_defn(var.getSourceVariable(), package.getEntryNode()) and
+      initModuleSubmoduleDefn(var.getSourceVariable(), package) and
       m = getModuleFromName(package.getPackageName() + "." + submodule) and
       result.asCfgNode() = var.getDefinition().(EssaNodeDefinition).getDefiningNode()
     )

python/ql/lib/semmle/python/dataflow/new/internal/TypeTrackingImpl.qll

@@ -94,8 +94,10 @@ private module SummaryTypeTrackerInput implements SummaryTypeTracker::Input {
   Node returnOf(Node callable, SummaryComponent return) {
     return = FlowSummaryImpl::Private::SummaryComponent::return() and
     // `result` should be the return value of a callable expression (lambda or function) referenced by `callable`
-    result.asCfgNode() =
+    exists(Return ret |
-      callable.getALocalSource().asExpr().(CallableExpr).getInnerScope().getAReturnValueFlowNode()
+      ret.getScope() = callable.getALocalSource().asExpr().(CallableExpr).getInnerScope() and
+      result.asCfgNode().getNode() = ret.getValue()
+    )
   }
 
   // Relating callables to nodes

python/ql/lib/semmle/python/dataflow/new/internal/VariableCapture.qll

@@ -61,7 +61,7 @@ private module CaptureInput implements Shared::InputSig<Location, Cfg::BasicBloc
   class VariableWrite extends ControlFlowNode {
     CapturedVariable v;
 
-    VariableWrite() { this = v.getAStore().getAFlowNode().(DefinitionNode).getValue() }
+    VariableWrite() { exists(DefinitionNode d | d.getNode() = v.getAStore() | this = d.getValue()) }
 
     CapturedVariable getVariable() { result = v }
 
@@ -71,7 +71,7 @@ private module CaptureInput implements Shared::InputSig<Location, Cfg::BasicBloc
   class VariableRead extends Expr {
     CapturedVariable v;
 
-    VariableRead() { this = v.getALoad().getAFlowNode() }
+    VariableRead() { this.getNode() = v.getALoad() }
 
     CapturedVariable getVariable() { result = v }
   }

python/ql/lib/semmle/python/dataflow/old/Implementation.qll

@@ -448,8 +448,7 @@ class TaintTrackingImplementation extends string instanceof TaintTracking::Confi
       context = TNoParam() and
       src = TTaintTrackingNode_(retval, TNoParam(), path, kind, this) and
       node.asCfgNode() = call and
-      retval.asCfgNode() =
+      retval.asCfgNode().getNode() = any(Return ret | ret.getScope() = pyfunc.getScope()).getValue()
-        any(Return ret | ret.getScope() = pyfunc.getScope()).getValue().getAFlowNode()
     ) and
     edgeLabel = "return"
   }
@@ -471,8 +470,7 @@ class TaintTrackingImplementation extends string instanceof TaintTracking::Confi
       this.callContexts(call, src, pyfunc, context, callee) and
       retnode = TTaintTrackingNode_(retval, callee, path, kind, this) and
       node.asCfgNode() = call and
-      retval.asCfgNode() =
+      retval.asCfgNode().getNode() = any(Return ret | ret.getScope() = pyfunc.getScope()).getValue()
-        any(Return ret | ret.getScope() = pyfunc.getScope()).getValue().getAFlowNode()
     ) and
     edgeLabel = "call"
   }
@@ -716,8 +714,10 @@ private class EssaTaintTracking extends string instanceof TaintTracking::Configu
       src = TTaintTrackingNode_(srcnode, context, path, srckind, this) and
       path.noAttribute()
     |
-      assign.getValue().getAFlowNode() = srcnode.asCfgNode() and
+      srcnode.asCfgNode().getNode() = assign.getValue() and
-      depth = iterable_unpacking_descent(assign.getATarget().getAFlowNode(), defn.getDefiningNode()) and
+      exists(SequenceNode left_parent | left_parent.getNode() = assign.getATarget() |
+        depth = iterable_unpacking_descent(left_parent, defn.getDefiningNode())
+      ) and
       kind = taint_at_depth(srckind, depth)
     )
   }
@@ -964,7 +964,7 @@ private TaintKind taint_at_depth(SequenceKind parent_kind, int depth) {
  * - with `left_defn` = `*y`, `left_parent` = `((x, *y), ...)`, result = 1
  */
 int iterable_unpacking_descent(SequenceNode left_parent, ControlFlowNode left_defn) {
-  exists(Assign a | a.getATarget().getASubExpression*().getAFlowNode() = left_parent) and
+  exists(Assign a | left_parent.getNode() = a.getATarget().getASubExpression*()) and
   left_parent.getAnElement() = left_defn and
   // Handle `a, *b = some_iterable`
   if left_defn instanceof StarredNode then result = 0 else result = 1

python/ql/lib/semmle/python/essa/SsaDefinitions.qll

@@ -56,7 +56,7 @@ module SsaSource {
   predicate with_definition(Variable v, ControlFlowNode defn) {
     exists(With with, Name var |
       with.getOptionalVars() = var and
-      var.getAFlowNode() = defn
+      defn.getNode() = var
     |
       var = v.getAStore()
     )
@@ -67,7 +67,7 @@ module SsaSource {
   predicate pattern_capture_definition(Variable v, ControlFlowNode defn) {
     exists(MatchCapturePattern capture, Name var |
       capture.getVariable() = var and
-      var.getAFlowNode() = defn
+      defn.getNode() = var
     |
       var = v.getAStore()
     )
@@ -78,7 +78,7 @@ module SsaSource {
   predicate pattern_alias_definition(Variable v, ControlFlowNode defn) {
     exists(MatchAsPattern pattern, Name var |
       pattern.getAlias() = var and
-      var.getAFlowNode() = defn
+      defn.getNode() = var
     |
       var = v.getAStore()
     )

python/ql/lib/semmle/python/frameworks/Bottle.qll

@@ -59,7 +59,7 @@ module Bottle {
 
         override Parameter getARoutedParameter() { none() }
 
-        override Function getARequestHandler() { result.getADecorator().getAFlowNode() = node }
+        override Function getARequestHandler() { node.getNode() = result.getADecorator() }
       }
     }
 
@@ -73,7 +73,10 @@ module Bottle {
       /** A response returned by a view callable. */
       class BottleReturnResponse extends Http::Server::HttpResponse::Range {
         BottleReturnResponse() {
-          this.asCfgNode() = any(View::ViewCallable vc).getAReturnValueFlowNode()
+          exists(Return ret |
+            ret.getScope() = any(View::ViewCallable vc) and
+            this.asCfgNode().getNode() = ret.getValue()
+          )
         }
 
         override DataFlow::Node getBody() { result = this }

python/ql/lib/semmle/python/frameworks/Django.qll

@@ -2872,7 +2872,10 @@ module PrivateDjango {
     DataFlow::CfgNode
   {
     DjangoRedirectViewGetRedirectUrlReturn() {
-      node = any(GetRedirectUrlFunction f).getAReturnValueFlowNode()
+      exists(Return ret |
+        ret.getScope() = any(GetRedirectUrlFunction f) and
+        node.getNode() = ret.getValue()
+      )
     }
 
     override DataFlow::Node getRedirectLocation() { result = this }

python/ql/lib/semmle/python/frameworks/FastApi.qll

@@ -129,7 +129,7 @@ module FastApi {
       result in [this.getArg(0), this.getArgByName("path")]
     }
 
-    override Function getARequestHandler() { result.getADecorator().getAFlowNode() = node }
+    override Function getARequestHandler() { node.getNode() = result.getADecorator() }
 
     override string getFramework() { result = "FastAPI" }
 
@@ -309,7 +309,10 @@ module FastApi {
       FastApiRouteSetup routeSetup;
 
       FastApiRequestHandlerReturn() {
-        node = routeSetup.getARequestHandler().getAReturnValueFlowNode()
+        exists(Return ret |
+          ret.getScope() = routeSetup.getARequestHandler() and
+          node.getNode() = ret.getValue()
+        )
       }
 
       override DataFlow::Node getBody() { result = this }

python/ql/lib/semmle/python/frameworks/Flask.qll

@@ -371,7 +371,7 @@ module Flask {
       result in [this.getArg(0), this.getArgByName("rule")]
     }
 
-    override Function getARequestHandler() { result.getADecorator().getAFlowNode() = node }
+    override Function getARequestHandler() { node.getNode() = result.getADecorator() }
   }
 
   /**
@@ -536,7 +536,7 @@ module Flask {
     FlaskRouteHandlerReturn() {
       exists(Function routeHandler |
         routeHandler = any(FlaskRouteSetup rs).getARequestHandler() and
-        node = routeHandler.getAReturnValueFlowNode() and
+        exists(Return ret | ret.getScope() = routeHandler and node.getNode() = ret.getValue()) and
         not this instanceof Flask::Response::InstanceSource
       )
     }

python/ql/lib/semmle/python/frameworks/FlaskAdmin.qll

@@ -38,7 +38,7 @@ private module FlaskAdmin {
       result in [this.getArg(0), this.getArgByName("url")]
     }
 
-    override Function getARequestHandler() { result.getADecorator().getAFlowNode() = node }
+    override Function getARequestHandler() { node.getNode() = result.getADecorator() }
   }
 
   /**
@@ -71,7 +71,7 @@ private module FlaskAdmin {
 
     override Function getARequestHandler() {
       exists(Flask::FlaskViewClass cls |
-        cls.getADecorator().getAFlowNode() = node and
+        node.getNode() = cls.getADecorator() and
         result = cls.getARequestHandler()
       )
     }

python/ql/lib/semmle/python/frameworks/Pyramid.qll

@@ -166,7 +166,10 @@ module Pyramid {
     /** A response returned by a view callable. */
     private class PyramidReturnResponse extends Http::Server::HttpResponse::Range {
       PyramidReturnResponse() {
-        this.asCfgNode() = any(View::ViewCallable vc).getAReturnValueFlowNode() and
+        exists(Return ret |
+          ret.getScope() = any(View::ViewCallable vc) and
+          this.asCfgNode().getNode() = ret.getValue()
+        ) and
         not this = instance()
       }
 

python/ql/lib/semmle/python/frameworks/Stdlib.qll

@@ -2254,8 +2254,9 @@ module StdlibPrivate {
       DataFlow::CfgNode
     {
       WsgirefSimpleServerApplicationReturn() {
-        exists(WsgirefSimpleServerApplication requestHandler |
+        exists(WsgirefSimpleServerApplication requestHandler, Return ret |
-          node = requestHandler.getAReturnValueFlowNode()
+          ret.getScope() = requestHandler and
+          node.getNode() = ret.getValue()
         )
       }
 

python/ql/lib/semmle/python/frameworks/Twisted.qll

@@ -182,7 +182,10 @@ private module Twisted {
     DataFlow::CfgNode
   {
     TwistedResourceRenderMethodReturn() {
-      this.asCfgNode() = any(TwistedResourceRenderMethod meth).getAReturnValueFlowNode()
+      exists(Return ret |
+        ret.getScope() = any(TwistedResourceRenderMethod meth) and
+        this.asCfgNode().getNode() = ret.getValue()
+      )
     }
 
     override DataFlow::Node getBody() { result = this }

python/ql/lib/semmle/python/internal/CachedStages.qll

@@ -77,7 +77,7 @@ module Stages {
       or
       exists(any(AstExtended::AstNode n).getParentNode())
       or
-      exists(any(AstExtended::AstNode n).getAFlowNode())
+      exists(PyFlow::ControlFlowNode cfg, AstExtended::AstNode n | cfg.getNode() = n)
       or
       exists(any(PyFlow::BasicBlock b).getImmediateDominator())
       or

python/ql/lib/semmle/python/objects/Callables.qll

@@ -56,8 +56,9 @@ abstract class CallableObjectInternal extends ObjectInternal {
 /** A Python function. */
 class PythonFunctionObjectInternal extends CallableObjectInternal, TPythonFunctionObject {
   override Function getScope() {
-    exists(CallableExpr expr |
+    exists(CallableExpr expr, ControlFlowNode exprCfg |
-      this = TPythonFunctionObject(expr.getAFlowNode()) and
+      exprCfg.getNode() = expr and
+      this = TPythonFunctionObject(exprCfg) and
       result = expr.getInnerScope()
     )
   }
@@ -80,11 +81,12 @@ class PythonFunctionObjectInternal extends CallableObjectInternal, TPythonFuncti
 
   pragma[nomagic]
   override predicate callResult(PointsToContext callee, ObjectInternal obj, CfgOrigin origin) {
-    exists(Function func, ControlFlowNode rval, ControlFlowNode forigin |
+    exists(Function func, Return ret, ControlFlowNode rval, ControlFlowNode forigin |
       func = this.getScope() and
       callee.appliesToScope(func)
     |
-      rval = func.getAReturnValueFlowNode() and
+      ret.getScope() = func and
+      rval.getNode() = ret.getValue() and
       PointsToInternal::pointsTo(rval, callee, obj, forigin) and
       origin = CfgOrigin::fromCfgNode(forigin)
     )
@@ -160,10 +162,11 @@ class PythonFunctionObjectInternal extends CallableObjectInternal, TPythonFuncti
 }
 
 private BasicBlock blockReturningNone(Function func) {
-  exists(Return ret |
+  exists(Return ret, ControlFlowNode ret_ |
     not exists(ret.getValue()) and
     ret.getScope() = func and
-    result = ret.getAFlowNode().getBasicBlock()
+    ret_.getNode() = ret and
+    result = ret_.getBasicBlock()
   )
 }
 

python/ql/lib/semmle/python/objects/Classes.qll

@@ -113,8 +113,9 @@ abstract class ClassObjectInternal extends ObjectInternal {
 class PythonClassObjectInternal extends ClassObjectInternal, TPythonClassObject {
   /** Gets the scope for this Python class */
   Class getScope() {
-    exists(ClassExpr expr |
+    exists(ClassExpr expr, ControlFlowNode exprCfg |
-      this = TPythonClassObject(expr.getAFlowNode()) and
+      exprCfg.getNode() = expr and
+      this = TPythonClassObject(exprCfg) and
       result = expr.getInnerScope()
     )
   }

python/ql/lib/semmle/python/objects/ObjectAPI.qll

@@ -745,7 +745,12 @@ class PythonFunctionValue extends FunctionValue {
   override int maxParameters() { result = this.getScope().getMaxPositionalArguments() }
 
   /** Gets a control flow node corresponding to a return statement in this function */
-  ControlFlowNode getAReturnedNode() { result = this.getScope().getAReturnValueFlowNode() }
+  ControlFlowNode getAReturnedNode() {
+    exists(Return ret |
+      ret.getScope() = this.getScope() and
+      result.getNode() = ret.getValue()
+    )
+  }
 
   override ClassValue getARaisedType() { scope_raises(result, this.getScope()) }
 

python/ql/lib/semmle/python/objects/TObject.qll

@@ -387,7 +387,7 @@ private PythonClassObjectInternal abcMetaClassObject() {
 private predicate neither_class_nor_static_method(Function f) {
   not exists(f.getADecorator())
   or
-  exists(ControlFlowNode deco | deco = f.getADecorator().getAFlowNode() |
+  exists(ControlFlowNode deco | deco.getNode() = f.getADecorator() |
     exists(ObjectInternal o | PointsToInternal::pointsTo(deco, _, o, _) |
       o != ObjectInternal::staticMethod() and
       o != ObjectInternal::classMethod()

python/ql/lib/semmle/python/pointsto/PointsTo.qll

@@ -711,7 +711,7 @@ private module InterModulePointsTo {
     ControlFlowNode f, PointsToContext context, ObjectInternal value, ControlFlowNode origin
   ) {
     exists(string name, ImportExpr i |
-      i.getAFlowNode() = f and
+      f.getNode() = i and
       i.getImportedModuleName() = name and
       PointsToInternal::module_imported_as(value, name) and
       origin = f and
@@ -2118,8 +2118,9 @@ module Types {
     result.getBuiltin() = cls.getBuiltin().getBaseClass() and n = 0
     or
     exists(Class pycls | pycls = cls.(PythonClassObjectInternal).getScope() |
-      exists(ObjectInternal base |
+      exists(ObjectInternal base, ControlFlowNode baseNode |
-        PointsToInternal::pointsTo(pycls.getBase(n).getAFlowNode(), _, base, _)
+        baseNode.getNode() = pycls.getBase(n) and
+        PointsToInternal::pointsTo(baseNode, _, base, _)
       |
         result = base and base != ObjectInternal::unknown()
         or
@@ -2223,7 +2224,10 @@ module Types {
   }
 
   private ControlFlowNode decorator_call_callee(PythonClassObjectInternal cls) {
-    result = cls.getScope().getADecorator().getAFlowNode().(CallNode).getFunction()
+    exists(CallNode deco |
+      deco.getNode() = cls.getScope().getADecorator() and
+      result = deco.getFunction()
+    )
   }
 
   private boolean has_six_add_metaclass(PythonClassObjectInternal cls) {
@@ -2262,7 +2266,7 @@ module Types {
   }
 
   private EssaVariable metaclass_var(Class cls) {
-    result.getASourceUse() = cls.getMetaClass().getAFlowNode()
+    result.getASourceUse().getNode() = cls.getMetaClass()
     or
     major_version() = 2 and
     not exists(cls.getMetaClass()) and

python/ql/lib/semmle/python/types/ClassObject.qll

@@ -181,7 +181,7 @@ class ClassObject extends Object {
     )
   }
 
-  ControlFlowNode declaredMetaClass() { result = this.getPyClass().getMetaClass().getAFlowNode() }
+  ControlFlowNode declaredMetaClass() { result.getNode() = this.getPyClass().getMetaClass() }
 
   /** Has type inference failed to compute the full class hierarchy for this class for the reason given. */
   predicate failedInference(string reason) { Types::failedInference(this.theClass(), reason) }
@@ -195,8 +195,9 @@ class ClassObject extends Object {
    * It is guaranteed that getProbableSingletonInstance() returns at most one Object for each ClassObject.
    */
   Object getProbableSingletonInstance() {
-    exists(ControlFlowNodeWithPointsTo use, Expr origin |
+    exists(ControlFlowNodeWithPointsTo use, Expr origin, ControlFlowNode origin_ |
-      use.refersTo(result, this, origin.getAFlowNode())
+      origin_.getNode() = origin and
+      use.refersTo(result, this, origin_)
     |
       this.hasStaticallyUniqueInstance() and
       /* Ensure that original expression will be executed only one. */

python/ql/lib/semmle/python/types/Exceptions.qll

@@ -427,7 +427,7 @@ class ExceptFlowNodeWithPointsTo extends ExceptFlowNode {
 }
 
 private ControlFlowNodeWithPointsTo element_from_tuple_objectapi(Object tuple) {
-  exists(Tuple t | t = tuple.getOrigin() and result = t.getAnElt().getAFlowNode())
+  exists(Tuple t | t = tuple.getOrigin() and result.getNode() = t.getAnElt())
 }
 
 /**

python/ql/lib/semmle/python/types/Extensions.qll

@@ -36,8 +36,8 @@ class RangeIterationVariableFact extends PointsToExtension {
   RangeIterationVariableFact() {
     exists(For f, ControlFlowNode iterable |
       iterable.getBasicBlock().dominates(this.(ControlFlowNode).getBasicBlock()) and
-      f.getIter().getAFlowNode() = iterable and
+      iterable.getNode() = f.getIter() and
-      f.getTarget().getAFlowNode() = this and
+      this.(ControlFlowNode).getNode() = f.getTarget() and
       exists(ObjectInternal range |
         PointsTo::pointsTo(iterable, _, range, _) and
         range.getClass() = ObjectInternal::builtin("range")

python/ql/lib/semmle/python/types/FunctionObject.qll

@@ -137,7 +137,10 @@ class PyFunctionObject extends FunctionObject {
 
   /** Gets a control flow node corresponding to the value of a return statement */
   ControlFlowNodeWithPointsTo getAReturnedNode() {
-    result = this.getFunction().getAReturnValueFlowNode()
+    exists(Return ret |
+      ret.getScope() = this.getFunction() and
+      result.getNode() = ret.getValue()
+    )
   }
 
   override string descriptiveString() {
@@ -170,7 +173,7 @@ class PyFunctionObject extends FunctionObject {
   predicate unconditionallyReturnsParameter(int n) {
     exists(SsaVariable pvar |
       exists(Parameter p | p = this.getFunction().getArg(n) |
-        p.asName().getAFlowNode() = pvar.getDefinition()
+        pvar.getDefinition().getNode() = p.asName()
       ) and
       exists(NameNode rval |
         rval = pvar.getAUse() and

python/ql/lib/semmle/python/types/Object.qll

@@ -337,7 +337,7 @@ class TupleObject extends SequenceObject {
     or
     this instanceof TupleNode
     or
-    exists(Function func | func.getVararg().getAFlowNode() = this)
+    exists(Function func | this.(ControlFlowNode).getNode() = func.getVararg())
   }
 }
 
@@ -352,7 +352,9 @@ module TupleObject {
 }
 
 class NonEmptyTupleObject extends TupleObject {
-  NonEmptyTupleObject() { exists(Function func | func.getVararg().getAFlowNode() = this) }
+  NonEmptyTupleObject() {
+    exists(Function func | this.(ControlFlowNode).getNode() = func.getVararg())
+  }
 
   override boolean booleanValue() { result = true }
 }

python/ql/src/Classes/ClassAttributes.qll

@@ -48,9 +48,11 @@ class CheckClass extends ClassObject {
         self_dict = sub.getObject()
         or
         /* Indirect assignment via temporary variable */
-        exists(SsaVariable v |
+        exists(SsaVariable v, ControlFlowNode subObjCfg, ControlFlowNode selfDictCfg |
-          v.getAUse() = sub.getObject().getAFlowNode() and
+          subObjCfg.getNode() = sub.getObject() and selfDictCfg.getNode() = self_dict
-          v.getDefinition().(DefinitionNode).getValue() = self_dict.getAFlowNode()
+        |
+          v.getAUse() = subObjCfg and
+          v.getDefinition().(DefinitionNode).getValue() = selfDictCfg
         )
       ) and
       a.getATarget() = sub and
@@ -62,9 +64,10 @@ class CheckClass extends ClassObject {
 
   pragma[nomagic]
   private predicate monkeyPatched(string name) {
-    exists(Attribute a |
+    exists(Attribute a, ControlFlowNode objCfg |
+      objCfg.getNode() = a.getObject() and
       a.getCtx() instanceof Store and
-      PointsTo::points_to(a.getObject().getAFlowNode(), _, this, _, _) and
+      PointsTo::points_to(objCfg, _, this, _, _) and
       a.getName() = name
     )
   }
@@ -84,9 +87,9 @@ class CheckClass extends ClassObject {
   }
 
   predicate interestingUndefined(SelfAttributeRead a) {
-    exists(string name | name = a.getName() |
+    exists(string name, ControlFlowNode aCfg | name = a.getName() and aCfg.getNode() = a |
       this.interestingContext(a, name) and
-      not this.definedInBlock(a.getAFlowNode().getBasicBlock(), name)
+      not this.definedInBlock(aCfg.getBasicBlock(), name)
     )
   }
 
@@ -109,8 +112,9 @@ class CheckClass extends ClassObject {
 
   pragma[nomagic]
   private predicate definitionInBlock(BasicBlock b, string name) {
-    exists(SelfAttributeStore sa |
+    exists(SelfAttributeStore sa, ControlFlowNode saCfg |
-      sa.getAFlowNode().getBasicBlock() = b and
+      saCfg.getNode() = sa and
+      saCfg.getBasicBlock() = b and
       sa.getName() = name and
       sa.getClass() = this.getPyClass()
     )

python/ql/src/Exceptions/CatchingBaseException.ql

@@ -15,7 +15,9 @@
 import python
 import semmle.python.ApiGraphs
 
-predicate doesnt_reraise(ExceptStmt ex) { ex.getAFlowNode().getBasicBlock().reachesExit() }
+predicate doesnt_reraise(ExceptStmt ex) {
+  exists(ControlFlowNode exCfg | exCfg.getNode() = ex | exCfg.getBasicBlock().reachesExit())
+}
 
 predicate catches_base_exception(ExceptStmt ex) {
   ex.getType() = API::builtin("BaseException").getAValueReachableFromSource().asExpr()

python/ql/src/Expressions/CallArgs.qll

@@ -116,7 +116,7 @@ FunctionValue get_function_or_initializer(Value func_or_cls) {
 predicate illegally_named_parameter_objectapi(Call call, Object func, string name) {
   not func.isC() and
   name = call.getANamedArgumentName() and
-  call.getAFlowNode() = get_a_call_objectapi(func) and
+  exists(ControlFlowNode callCfg | callCfg.getNode() = call | callCfg = get_a_call_objectapi(func)) and
   not get_function_or_initializer_objectapi(func).isLegalArgumentName(name)
 }
 
@@ -124,7 +124,7 @@ predicate illegally_named_parameter_objectapi(Call call, Object func, string nam
 predicate illegally_named_parameter(Call call, Value func, string name) {
   not func.isBuiltin() and
   name = call.getANamedArgumentName() and
-  call.getAFlowNode() = get_a_call(func) and
+  exists(ControlFlowNode callCfg | callCfg.getNode() = call | callCfg = get_a_call(func)) and
   not get_function_or_initializer(func).isLegalArgumentName(name)
 }
 
@@ -146,7 +146,9 @@ predicate too_few_args_objectapi(Call call, Object callable, int limit) {
     call = func.getAMethodCall().getNode() and limit = func.minParameters() - 1
     or
     callable instanceof ClassObject and
-    call.getAFlowNode() = get_a_call_objectapi(callable) and
+    exists(ControlFlowNode callCfg | callCfg.getNode() = call |
+      callCfg = get_a_call_objectapi(callable)
+    ) and
     limit = func.minParameters() - 1
   )
 }
@@ -172,7 +174,7 @@ predicate too_few_args(Call call, Value callable, int limit) {
     call = func.getAMethodCall().getNode() and limit = func.minParameters() - 1
     or
     callable instanceof ClassValue and
-    call.getAFlowNode() = get_a_call(callable) and
+    exists(ControlFlowNode callCfg | callCfg.getNode() = call | callCfg = get_a_call(callable)) and
     limit = func.minParameters() - 1
   )
 }
@@ -191,7 +193,9 @@ predicate too_many_args_objectapi(Call call, Object callable, int limit) {
     call = func.getAMethodCall().getNode() and limit = func.maxParameters() - 1
     or
     callable instanceof ClassObject and
-    call.getAFlowNode() = get_a_call_objectapi(callable) and
+    exists(ControlFlowNode callCfg | callCfg.getNode() = call |
+      callCfg = get_a_call_objectapi(callable)
+    ) and
     limit = func.maxParameters() - 1
   ) and
   positional_arg_count_for_call_objectapi(call, callable) > limit
@@ -211,7 +215,7 @@ predicate too_many_args(Call call, Value callable, int limit) {
     call = func.getAMethodCall().getNode() and limit = func.maxParameters() - 1
     or
     callable instanceof ClassValue and
-    call.getAFlowNode() = get_a_call(callable) and
+    exists(ControlFlowNode callCfg | callCfg.getNode() = call | callCfg = get_a_call(callable)) and
     limit = func.maxParameters() - 1
   ) and
   positional_arg_count_for_call(call, callable) > limit

python/ql/src/Expressions/DuplicateKeyInDictionaryLiteral.ql

@@ -36,11 +36,15 @@ where
   exists(string s | dict_key(d, k1, s) and dict_key(d, k2, s) and k1 != k2) and
   (
     exists(BasicBlock b, int i1, int i2 |
-      k1.getAFlowNode() = b.getNode(i1) and
+      b.getNode(i1).getNode() = k1 and
-      k2.getAFlowNode() = b.getNode(i2) and
+      b.getNode(i2).getNode() = k2 and
       i1 < i2
     )
     or
-    k1.getAFlowNode().getBasicBlock().strictlyDominates(k2.getAFlowNode().getBasicBlock())
+    exists(ControlFlowNode k1Cfg, ControlFlowNode k2Cfg |
+      k1Cfg.getNode() = k1 and k2Cfg.getNode() = k2
+    |
+      k1Cfg.getBasicBlock().strictlyDominates(k2Cfg.getBasicBlock())
+    )
   )
 select k1, "Dictionary key " + repr(k1) + " is subsequently $@.", k2, "overwritten"

python/ql/src/Expressions/Formatting/AdvancedFormatting.qll

@@ -98,16 +98,18 @@ private predicate brace_pair(PossibleAdvancedFormatString fmt, int start, int en
 }
 
 private predicate advanced_format_call(Call format_expr, PossibleAdvancedFormatString fmt, int args) {
-  exists(CallNode call | call = format_expr.getAFlowNode() |
+  exists(CallNode call, ControlFlowNode fmtCfg |
+    call.getNode() = format_expr and fmtCfg.getNode() = fmt
+  |
     call.getFunction().(ControlFlowNodeWithPointsTo).pointsTo(Value::named("format")) and
-    call.getArg(0).(ControlFlowNodeWithPointsTo).pointsTo(_, fmt.getAFlowNode()) and
+    call.getArg(0).(ControlFlowNodeWithPointsTo).pointsTo(_, fmtCfg) and
     args = count(format_expr.getAnArg()) - 1
     or
     call.getFunction()
         .(AttrNode)
         .getObject("format")
         .(ControlFlowNodeWithPointsTo)
-        .pointsTo(_, fmt.getAFlowNode()) and
+        .pointsTo(_, fmtCfg) and
     args = count(format_expr.getAnArg())
   )
 }