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codeql/python/ql/src/analysis/PointsToFailure.ql
Copilot 717ff62d70 Python: deprecate AstNode.getAFlowNode() and rewrite internal callers
Preparatory refactor for the shared-CFG dataflow migration.

Deprecates the AstNode.getAFlowNode() cached predicate on the public
Python QL API and rewrites all ~140 internal callers across lib/, src/,
test/, and tools/ from `expr.getAFlowNode() = cfgNode` to
`cfgNode.getNode() = expr`, using ControlFlowNode.getNode() which
already exists in Flow.qll.

The predicate itself is preserved (with a deprecation note pointing at
the new pattern) so external users do not experience churn — they can
migrate at their own pace and the AST/CFG hierarchies still get the
intended untangling once the deprecation eventually elapses.

Semantic noop verified by:
- All 361 lib/ + src/ queries compile clean.
- All 122 ControlFlow + PointsTo library-tests pass.
- All 64 dataflow library-tests pass.
- All 113 Variables/Exceptions/Expressions/Statements/Functions/Imports/
  Security/CWE-798/ModificationOfParameterWithDefault query-tests pass.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-06-22 14:55:19 +02:00

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/**
* @name points-to fails for expression
* @description Expression does not "point-to" an object which prevents type inference.
* @kind problem
* @id py/points-to-failure
* @problem.severity info
* @tags debug
* @deprecated
*/
import python
private import LegacyPointsTo
from Expr e
where exists(ControlFlowNodeWithPointsTo f | f.getNode() = e | not f.refersTo(_))
select e, "Expression does not 'point-to' any object."