Go: fix some duplicate results in go/index-out-of-bounds - #22678
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owen-mc merged 3 commits intoSep 28, 2026
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🟢 Approval recommended
The focused guard filtering matches the intended behavior and is covered by an appropriate regression test.
Review effort: Balanced
Findings: None
What changed in this PR
Fixes duplicate go/index-out-of-bounds alerts by reporting only the innermost dominating guard.
Changes:
- Filters out enclosing duplicate guards.
- Adds a regression test for chained conditions.
- Updates expected query results.
| File | Description |
|---|---|
go/ql/src/InconsistentCode/LengthComparisonOffByOne.ql |
Selects the innermost applicable guard. |
go/ql/test/query-tests/InconsistentCode/LengthComparisonOffByOne/main.go |
Adds the regression case. |
go/ql/test/query-tests/InconsistentCode/LengthComparisonOffByOne/LengthComparisonOffByOne.expected |
Records the single expected alert. |
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michaelnebel
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Sep 28, 2026
michaelnebel
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Looks good to me!
Is DCA needed?
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When the result should be
Aand it is in a condition likeA && B && Cthen we were creating results forAandA && BandA && B && C. This was caused by changes to guards in #22182. The fix is to only alert for the innermost condition. A test has been added to demonstrate the bug and show that it is fixed.This does not need a change note as it is fixing FPs that haven't been in any release.