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[3.12] gh-110378: Close invalid generators in contextmanager and asynccontextmanager (GH-110499) (#110588)

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contextmanager and asynccontextmanager context managers now close an invalid
underlying generator object that yields more then one value.
(cherry picked from commit 96fed66a65)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2023-10-10 11:12:28 +02:00 • committed by GitHub
parent 36886726a2
commit 2fc80814bf
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4 changed files with 43 additions and 7 deletions
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21
Lib/test/test_contextlib.py
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@ -157,9 +157,24 @@ class ContextManagerTestCase(unittest.TestCase):
yield
ctx = whoo()
ctx.__enter__()
self.assertRaises(
RuntimeError, ctx.__exit__, TypeError, TypeError("foo"), None
)
with self.assertRaises(RuntimeError):
ctx.__exit__(TypeError, TypeError("foo"), None)
if support.check_impl_detail(cpython=True):
# The "gen" attribute is an implementation detail.
self.assertFalse(ctx.gen.gi_suspended)
def test_contextmanager_trap_second_yield(self):
@contextmanager
def whoo():
yield
yield
ctx = whoo()
ctx.__enter__()
with self.assertRaises(RuntimeError):
ctx.__exit__(None, None, None)
if support.check_impl_detail(cpython=True):
# The "gen" attribute is an implementation detail.
self.assertFalse(ctx.gen.gi_suspended)
def test_contextmanager_except(self):
state = []