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Fail fast when user tries to generate reports with parallel workers #21341

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Merged
ilevkivskyi merged 3 commits into from
Apr 27, 2026
Merged

Fail fast when user tries to generate reports with parallel workers #21341

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Fail fast when user tries to generate reports with parallel workers
ilevkivskyi Apr 27, 2026
80a2336
Suggest -n0; fix capitalization
ilevkivskyi Apr 27, 2026
9973aac
Update test
ilevkivskyi Apr 27, 2026
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2 changes: 2 additions & 0 deletions mypy/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,8 @@ def main(
options.native_parser = True
if options.cache_dir == os.devnull:
fail("error: cache must be enabled in parallel mode", stderr, options)
if options.report_dirs:
fail("error: reports are not supported in parallel mode yet", stderr, options)
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@JukkaL JukkaL Apr 27, 2026

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Suggest using -n0 to disable parallel mode (in case it's picked up from the config file, so user might not remember how to do it)?

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@ilevkivskyi ilevkivskyi Apr 27, 2026

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Yeah, good idea.


if options.allow_redefinition and not options.local_partial_types:
fail(
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