asyncio: Be careful accessing instance variables in __del__ (closes #21340).
diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index c6c22dd..e8ee947 100644
--- 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__