Miss Islington (bot) dcfbd3be9f
[3.13] gh-119525: Fix deadlock with _PyType_Lookup and the GIL (GH-119527) (#119746)
The deadlock only affected the free-threaded build and only occurred
when the GIL was enabled at runtime. The `Py_DECREF(old_name)` call
might temporarily release the GIL while holding the type seqlock.
Another thread may spin trying to acquire the seqlock while holding the
GIL.

The deadlock occurred roughly 1 in ~1,000 runs of `pool_in_threads.py`
from `test_multiprocessing_pool_circular_import`.
(cherry picked from commit c22323cd1c200ca1b22c47af95f67c4b2d661fe7)

Co-authored-by: Sam Gross <colesbury@gmail.com>
2024-05-29 19:47:47 +00:00
..

Source files for various builtin objects