Java: Fix false positives in evaluation-to-constant query for ErrorType #20546
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Pull Request Overview
Fixes false positives in the evaluation-to-constant query for ErrorType by adding a type check to exclude TypeAccess expressions that resolve to ErrorType. This prevents the query from incorrectly flagging unresolved types as constant expressions.
- Added type check condition to exclude ErrorType instances from constant expression evaluation
- Added integration test to verify the fix works correctly for unresolved types like
Minecraft
Reviewed Changes
Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
ConstantExpAppearsNonConstant.ql |
Modified predicate to exclude TypeAccess expressions that resolve to ErrorType |
test.py |
Created integration test configuration |
Test.java |
Added test case with unresolved Minecraft type reference |
ConstantExpAppearsNonConstant.qlref |
Added query reference for integration test |
owen-mc
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Sep 30, 2025
.../integration-tests/java/evaluation-to-constant-errortype/ConstantExpAppearsNonConstant.qlref
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java/ql/src/Likely Bugs/Arithmetic/ConstantExpAppearsNonConstant.ql
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owen-mc
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Sep 30, 2025
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This PR fixes the FPs described in the issue linked below.
Closes: http://github.com/github/codeql-java-team/issues/425
DCA Nightly Buildless: https://github.com/github/codeql-dca-main/issues/31838
DCA Nightly: https://github.com/github/codeql-dca-main/issues/31839