From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Sat, 22 Oct 2022 16:05:11 +0000 (+0530)
Subject: GH-98543: Fix `asyncio.TaskGroup`  to not keep reference to errors after raising... 
X-Git-Tag: v3.12.0a1~24
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f4a14941e6e54b15012fca067f6a9b2ff29f201a;p=thirdparty%2FPython%2Fcpython.git

GH-98543: Fix `asyncio.TaskGroup`  to not keep reference to errors after raising ExceptionGroup  (#98544)
---

diff --git a/Lib/asyncio/taskgroups.py b/Lib/asyncio/taskgroups.py
index 5d5e2a8a85dd..911419e1769c 100644
--- a/Lib/asyncio/taskgroups.py
+++ b/Lib/asyncio/taskgroups.py
@@ -128,11 +128,11 @@ class TaskGroup:
             # Exceptions are heavy objects that can have object
             # cycles (bad for GC); let's not keep a reference to
             # a bunch of them.
-            errors = self._errors
-            self._errors = None
-
-            me = BaseExceptionGroup('unhandled errors in a TaskGroup', errors)
-            raise me from None
+            try:
+                me = BaseExceptionGroup('unhandled errors in a TaskGroup', self._errors)
+                raise me from None
+            finally:
+                self._errors = None
 
     def create_task(self, coro, *, name=None, context=None):
         if not self._entered: