bpo-33672: Fix Task.__repr__ crash with Cython's bogus coroutines (GH-7161) (GH-7173)

(cherry picked from commit 989b9e0e6d7dd2fa911f9bfd4744e7f3a82d6006)

Co-authored-by: Yury Selivanov <yury@magic.io>

1 files changed, 5 insertions, 4 deletions

diff --git a/Lib/asyncio/format_helpers.py b/Lib/asyncio/format_helpers.py
index 39cfcee..27d11fd 100644
--- a/Lib/asyncio/format_helpers.py
+++ b/Lib/asyncio/format_helpers.py
@@ -1,6 +1,7 @@
 import functools
 import inspect
 import reprlib
+import sys
 import traceback
 
 from . import constants
@@ -45,10 +46,10 @@ def _format_callback(func, args, kwargs, suffix=''):
         suffix = _format_args_and_kwargs(args, kwargs) + suffix
         return _format_callback(func.func, func.args, func.keywords, suffix)
 
-    if hasattr(func, '__qualname__'):
-        func_repr = getattr(func, '__qualname__')
-    elif hasattr(func, '__name__'):
-        func_repr = getattr(func, '__name__')
+    if hasattr(func, '__qualname__') and func.__qualname__:
+        func_repr = func.__qualname__
+    elif hasattr(func, '__name__') and func.__name__:
+        func_repr = func.__name__
     else:
         func_repr = repr(func)