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Cary Hawkins 926b0bf311 gh-159652: Fix import lock leak when the C stack is nearly exhausted (GH-159660)

When an import failed with a stack overflow RecursionError, releasing the import locks on the error path could itself raise RecursionError, because the cleanup runs in a new C frame. This left the global import lock or a module lock held forever, and later imports in other threads blocked indefinitely.

_imp.acquire_lock() now raises RecursionError when there is not enough stack left to release the lock. importlib calls it before taking any import lock, so this covers the per-module locks too. The module lock weakref callback skips cleanup in that case instead of
reporting an unraisable exception.

2026-10-27 14:43:36 -07:00

metadata

gh-143387: Raise an exception instead of returning None when metadata file is missing. (#146234 )

2026-03-23 09:12:36 -04:00

resources

gh-121190: Emit a better error message from importlib.resources.files() when module spec is None" (#148460 )

2026-04-12 18:15:01 -04:00

__init__.py

GH-139686: Revert "gh-139686: Make reloading a lazy module no-op (GH-139857)" (#143584 )

2026-01-08 22:08:03 +00:00

_abc.py

GH-97850: Remove all uses and definitions of load_module() from importlib (#142205 )