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-rw-r--r--Lib/traceback.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/traceback.py b/Lib/traceback.py
index eb2fdf6..e395ad7 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -162,6 +162,11 @@ def format_exception_only(etype, value):
"""
+ # Gracefully handle (the way Python 2.4 and earlier did) the case of
+ # being called with (None, None).
+ if etype is None:
+ return [_format_final_exc_line(etype, value)]
+
stype = etype.__name__
smod = etype.__module__
if smod not in ("exceptions", "__main__", "__builtin__"):