From: Guido van Rossum <guido@python.org>
Date: Sun, 27 Apr 2014 17:33:58 +0000 (-0700)
Subject: asyncio: Be careful accessing instance variables in __del__ (closes #21340).
X-Git-Tag: v3.4.1rc1~22
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=83c1ddda469e7a99f11afc7d6758b3d80ad9aa3b;p=python

asyncio: Be careful accessing instance variables in __del__ (closes #21340).
---

diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index c6c22dd29f..e8ee947501 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -76,7 +76,9 @@ class CoroWrapper:
         return self.gen.gi_code
 
     def __del__(self):
-        frame = self.gen.gi_frame
+        # Be careful accessing self.gen.frame -- self.gen might not exist.
+        gen = getattr(self, 'gen', None)
+        frame = getattr(gen, 'gi_frame', None)
         if frame is not None and frame.f_lasti == -1:
             func = self.func
             code = func.__code__