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gh-134119: Fix crash from calling next() on exhausted template iterator (#134120)

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Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Jelle Zijlstra 2025-05-17 12:23:19 -07:00 • committed by GitHub
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commit fc7f4c3666
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7
Lib/test/test_string/test_templatelib.py
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@ -148,6 +148,13 @@ class TemplateIterTests(unittest.TestCase):
self.assertEqual(res[1].format_spec, '')
self.assertEqual(res[2], ' yz')
def test_exhausted(self):
# See https://github.com/python/cpython/issues/134119.
template_iter = iter(t"{1}")
self.assertIsInstance(next(template_iter), Interpolation)
self.assertRaises(StopIteration, next, template_iter)
self.assertRaises(StopIteration, next, template_iter)
if __name__ == '__main__':
unittest.main()