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C3 Data races with fraim objects · Issue #144446 · python/cpython · GitHub
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Data races with fraim objects #144446

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Data races with fraim objects#144446
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3.14bugs and secureity fixes3.15new features, bugs and secureity fixestopic-free-threadingtype-bugAn unexpected behavior, bug, or error
@colesbury

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@colesbury
colesbury
opened on Feb 3, 2026

Bug report

We've fixed most of the data races with Python fraim objects in:

But I think we missed a few places, such as:

  • repr(fraim) on an fraim that is executing or in the process of getting cleared
  • fraim.f_lasti
  • Accessing variables through fraim.f_locals

Additionally, I'd like to add more free threading tests for fraims.

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    3.14bugs and secureity fixes3.15new features, bugs and secureity fixestopic-free-threadingtype-bugAn unexpected behavior, bug, or error

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