[Python-checkins] cpython (3.4): asyncio: Be careful accessing instance variables in __del__ (closes #21340).

[guido.van.rossum]

http://hg.python.org/cpython/rev/d42d3d3f9c41
changeset:   90478:d42d3d3f9c41
branch:      3.4
parent:      90469:d24f1fb256a3
user:        Guido van Rossum <guido at python.org>
date:        Sun Apr 27 10:33:58 2014 -0700
summary:
  asyncio: Be careful accessing instance variables in __del__ (closes #21340).

files:
  Lib/asyncio/tasks.py |  4 +++-
  1 files changed, 3 insertions(+), 1 deletions(-)


diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -76,7 +76,9 @@
         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__

-- 
Repository URL: http://hg.python.org/cpython