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Diffstat (limited to 'Lib/test/test_warnings.py')
-rw-r--r-- | Lib/test/test_warnings.py | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py index ca27519..d093994 100644 --- a/Lib/test/test_warnings.py +++ b/Lib/test/test_warnings.py @@ -327,6 +327,19 @@ class WarnTests(unittest.TestCase): self.module.warn_explicit, None, Warning, None, 1, registry=42) + def test_bad_str(self): + # issue 6415 + # Warnings instance with a bad format string for __str__ should not + # trigger a bus error. + class BadStrWarning(Warning): + """Warning with a bad format string for __str__.""" + def __str__(self): + return ("A bad formatted string %(err)" % + {"err" : "there is no %(err)s"}) + + with self.assertRaises(ValueError): + self.module.warn(BadStrWarning()) + class CWarnTests(BaseTest, WarnTests): module = c_warnings |