gh-127065: Make methodcaller thread-safe in free threading build
#127109
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The `methodcaller` C vectorcall implementation uses an arguments array that is shared across calls. The first argument is modified on every invocation. This isn't thread-safe in the free threading build. I think it's also not safe in general, but for now just disable it in the free threading build.
colesbury
added
topic-free-threading
needs backport to 3.13
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Would it be worth adding a regression test? |
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I think it'll be better to rely on something similar to pytest-run-parallel on |
sgtm |
mpage
approved these changes
Nov 21, 2024
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The
methodcallerC vectorcall implementation uses an arguments array that is shared across calls. The first argument is modified on every invocation. This isn't thread-safe in the free threading build. I think it's also not safe in general, but for now just disable it in the free threading build.methodcalleris not thread-safe (or re-entrant) #127065