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[3.14] gh-134119: Fix crash from calling next() on exhausted template iterator (GH-134120) (#134153)

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gh-134119: Fix crash from calling next() on exhausted template iterator (GH-134120)
(cherry picked from commit fc7f4c3666)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Miss Islington (bot) 2025-05-17 21:48:54 +02:00 • committed by GitHub
parent cca18fcbe8
commit 1ba5e65b76
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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()