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scripts/fuzz-parser: work around race condition from running cargo build concurrently (#11039)

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Alex Waygood 2024-04-19 14:42:28 +01:00 • committed by GitHub
parent 0ff25a540c
commit fdbcb62adc
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1 changed files with 11 additions and 6 deletions
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17
scripts/fuzz-parser/fuzz.py
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@ -89,12 +89,17 @@ def fuzz_code(seed: Seed, only_new_bugs: bool) -> FuzzResult:
try:
new_code = minimize_repro(code, contains_bug)
except ValueError:
# `pysource_minimize.minimize()` sometimes raises `ValueError` internally.
# Just ignore it if so, and use the original generated code;
# minimizing the repro is a nice-to-have, but isn't crucial.
new_code = code
return FuzzResult(seed, MinimizedSourceCode(new_code))
return FuzzResult(seed, None)
# `pysource_minimize.minimize()` failed to reproduce the bug.
# This could indicate that `contains_bug()` failed due to a race condition
# from running `cargo build` concurrently, so double-check that the
# original snippet does actually reproduce the bug. If so, just go with the
# original snippet; if not, report the fuzzing as successful:
maybe_bug = MinimizedSourceCode(code) if contains_bug(code) else None
else:
maybe_bug = MinimizedSourceCode(new_code)
else:
maybe_bug = None
return FuzzResult(seed, maybe_bug)
def run_fuzzer_concurrently(args: ResolvedCliArgs) -> list[FuzzResult]: