Issue #6415: Fixed warnings.warn sagfault on bad formatted string.
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 @@
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