gh-106176: Fix reference leak in importlib/_bootstrap.py

Eclips4 · Eclips4 · commit 5328e32d84ae · 2023-06-28T18:27:03.000+03:00
diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
@@ -85,6 +85,8 @@ def __enter__(self):
     def __exit__(self, *args, **kwargs):
         """Remove self.lock from this thread's _blocking_on list."""
         self.blocked_on.remove(self.lock)
+        if not self.blocked_on:
+            del _blocking_on[self.thread_id]
 
 
 class _DeadlockError(RuntimeError):
