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Title: [3.14] gh-116738: Fix thread-safety issue in re module for free threading (gh-141923) by miss-islington · Pull Request #141990 · python/cpython · GitHub

Open Graph Title: [3.14] gh-116738: Fix thread-safety issue in re module for free threading (gh-141923) by miss-islington · Pull Request #141990 · python/cpython

X Title: [3.14] gh-116738: Fix thread-safety issue in re module for free threading (gh-141923) by miss-islington · Pull Request #141990 · python/cpython

Description: Added atomic operations to scanner_begin() and scanner_end() to prevent race conditions on the executing flag in free-threaded builds. Also added tests for concurrent usage of the re module. Without the atomic operations, test_scanner_concurrent_access() triggers assert(self->executing) failures, or a thread sanitizer run emits errors. (cherry picked from commit bc9e63d) Co-authored-by: Alper alperyoney@fb.com Issue: gh-116738

Open Graph Description: Added atomic operations to scanner_begin() and scanner_end() to prevent race conditions on the executing flag in free-threaded builds. Also added tests for concurrent usage of the re module. Withou...

X Description: Added atomic operations to scanner_begin() and scanner_end() to prevent race conditions on the executing flag in free-threaded builds. Also added tests for concurrent usage of the re module. Withou...

Opengraph URL: https://github.com/python/cpython/pull/141990

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