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fix: failpoint-toolexec not working on Windows - #90
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On Windows, the compile command is never detected because `strings.TrimSuffix(goCmd, ".exe")` operates on the full path (e.g. `C:\...\compile.exe` → `C:\...\compile`) instead of the base name. The comparison `goCmdBase == "compile"` always fails. Fix: use `goCmdBase` instead of `goCmd` in TrimSuffix.
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kennytm
approved these changes
Apr 3, 2026
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Summary
failpoint-toolexecsilently skips all failpoint injection on Windows due to a typo on line 40 offailpoint-toolexec/main.go.Bug:
strings.TrimSuffix(goCmd, ".exe")operates on the full path (C:\...\compile.exe→C:\...\compile) instead of the base name. The comparisongoCmdBase == "compile"always evaluates tofalse, so the compile command is never intercepted.Fix:
strings.TrimSuffix(goCmdBase, ".exe")Reproduction
On Windows,
failpoint.Injectmarkers are never rewritten when using-toolexec failpoint-toolexec. Tests that rely on failpoint injection silently pass without actually injecting errors.Verified by logging the values inside the toolexec binary:
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