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_decimal: mpd_context_t::status/traps mutated non-atomically leading to data race

docsDocumentation in the Doc dirDocumentation in the Doc dir

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#149142 In python/cpython;

· devdanzin opened on Apr 29, 2026

PyThreadState_GetFrame() thread-safety is unclear (and inconsistent with sys._current_frames())

docsDocumentation in the Doc dirDocumentation in the Doc dir

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

Status: Open.

#148589 In python/cpython;

· devdanzin opened on Apr 15, 2026

functools.lru_cache critical section locks self but _LockHeld dict APIs assert self->cache is locked

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-free-threading

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#148180 In python/cpython;

· devdanzin opened on Apr 6, 2026

tracemalloc aborts when run from threads in no-gil

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#126315 In python/cpython;

· devdanzin opened on Nov 1, 2024