From: Dong-hee Na <donghee.na@python.org>
Date: Fri, 17 Feb 2023 10:14:07 +0000 (+0900)
Subject: gh-101766: Fix refleak for _BlockingOnManager resources (gh-101942)
X-Git-Tag: v3.12.0a6~144
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=775f8819e319127f9bfb046773b74bcc62c68b6a;p=thirdparty%2FPython%2Fcpython.git

gh-101766: Fix refleak for _BlockingOnManager resources (gh-101942)
---

diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index bebe7e15cbce..1ef7b6adb044 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -85,6 +85,11 @@ class _BlockingOnManager:
     def __exit__(self, *args, **kwargs):
         """Remove self.lock from this thread's _blocking_on list."""
         self.blocked_on.remove(self.lock)
+        if len(self.blocked_on) == 0:
+            # gh-101766: glboal cache should be cleaned-up
+            # if there is no more _blocking_on for this thread.
+            del _blocking_on[self.thread_id]
+            del self.blocked_on
 
 
 class _DeadlockError(RuntimeError):