bpo-43146: fix None-handling in single-arg traceback.print_exception(None) (GH-24629)
(The previous commit fixed print_exception(None, None, None).)
diff --git a/Lib/traceback.py b/Lib/traceback.py
index dfb296c..8f908dd 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -91,7 +91,10 @@ def _parse_value_tb(exc, value, tb):
if (value is _sentinel) != (tb is _sentinel):
raise ValueError("Both or neither of value and tb must be given")
if value is tb is _sentinel:
- return exc, exc.__traceback__
+ if exc is not None:
+ return exc, exc.__traceback__
+ else:
+ return None, None
return value, tb