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-rw-r--r--Lib/test/test_traceback.py11
-rw-r--r--Lib/traceback.py2
2 files changed, 13 insertions, 0 deletions
diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py
index d88851d..cde35f5 100644
--- a/Lib/test/test_traceback.py
+++ b/Lib/test/test_traceback.py
@@ -1254,6 +1254,17 @@ class BaseExceptionReportingTests:
exp = "%s: %s\n" % (str_name, str_value)
self.assertEqual(exp, err)
+ def test_exception_modulename_not_unicode(self):
+ class X(Exception):
+ def __str__(self):
+ return "I am X"
+
+ X.__module__ = 42
+
+ err = self.get_report(X())
+ exp = f'<unknown>.{X.__qualname__}: I am X\n'
+ self.assertEqual(exp, err)
+
def test_exception_bad__str__(self):
class X(Exception):
def __str__(self):
diff --git a/Lib/traceback.py b/Lib/traceback.py
index 97caa13..77f8590 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -808,6 +808,8 @@ class TracebackException:
stype = self.exc_type.__qualname__
smod = self.exc_type.__module__
if smod not in ("__main__", "builtins"):
+ if not isinstance(smod, str):
+ smod = "<unknown>"
stype = smod + '.' + stype
if not issubclass(self.exc_type, SyntaxError):