From 5328e32d84aea4008d00895959ace5af2d2293a4 Mon Sep 17 00:00:00 2001
From: Kirill Podoprigora <kirill.bast9@mail.ru>
Date: Wed, 28 Jun 2023 18:27:03 +0300
Subject: [PATCH] gh-106176: Fix reference leak in importlib/_bootstrap.py

---
 Lib/importlib/_bootstrap.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index c48fd506a0e4eb..bbd7298eda3f0f 100644
--- 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):