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Code Issues Releases Activity

bpo-43146: fix regression in traceback.print_exception(None) (GH-24463)

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This commit is contained in:
Irit Katriel 2021-02-23 14:58:47 +00:00 committed by GitHub
parent 7bb1cafa4e
commit 26f18b8540
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 22 additions and 1 deletions
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18
Lib/test/test_traceback.py
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@ -232,6 +232,24 @@ class TracebackCases(unittest.TestCase):
output = traceback.format_exception_only(Exception("projector"))
self.assertEqual(output, ["Exception: projector\n"])
def test_exception_is_None(self):
NONE_EXC_STRING = 'NoneType: None\n'
excfile = StringIO()
traceback.print_exception(None, None, None, file=excfile)
self.assertEqual(excfile.getvalue(), NONE_EXC_STRING)
excfile = StringIO()
traceback.print_exc(None, file=excfile)
self.assertEqual(excfile.getvalue(), NONE_EXC_STRING)
self.assertEqual(traceback.format_exc(None), NONE_EXC_STRING)
self.assertEqual(
traceback.format_exception(None, None, None), [NONE_EXC_STRING])
self.assertEqual(
traceback.format_exception_only(None), [NONE_EXC_STRING])
self.assertEqual(
traceback.format_exception_only(None, None), [NONE_EXC_STRING])
class TracebackFormatTests(unittest.TestCase):

4
Lib/traceback.py
View File

@ -528,7 +528,9 @@ class TracebackException:
cause = None
if compact:
need_context = cause is None and not e.__suppress_context__
need_context = (cause is None and
e is not None and
not e.__suppress_context__)
else:
need_context = True
if (e and e.__context__ is not None

1
Misc/NEWS.d/next/Library/2021-02-06-21-21-35.bpo-43146.MHtb2v.rst Normal file
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@ -0,0 +1 @@
Fix recent regression in None argument handling in :mod:`~traceback` module functions.