Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-12-31 04:23:37 +00:00
Code Issues Projects Releases Packages Wiki Activity

GH-100964: Fix reference cycle in exhausted generator frames (#141112)

Browse source
This commit is contained in:
Savannah Ostrowski 2025-12-17 11:21:45 -08:00 • committed by GitHub
parent 25397f9541
commit 92243dc62c
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
3 changed files with 14 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Lib/test/test_generators.py
View file

@ -134,6 +134,18 @@ def gen():
self.assertEqual(len(resurrected), 1)
self.assertIsInstance(resurrected[0].gi_code, types.CodeType)
def test_exhausted_generator_frame_cycle(self):
def g():
yield
generator = g()
frame = generator.gi_frame
self.assertIsNone(frame.f_back)
next(generator)
self.assertIsNone(frame.f_back)
next(generator, None)
self.assertIsNone(frame.f_back)
class GeneratorTest(unittest.TestCase):

1
Misc/NEWS.d/next/Core_and_Builtins/2025-11-06-05-21-25.gh-issue-100964.TxPf1b.rst Normal file
View file

@ -0,0 +1 @@
Fix reference cycle in exhausted generator frames. Patch by Savannah Ostrowski.

2
Python/ceval.c
View file

@ -2309,9 +2309,9 @@ clear_gen_frame(PyThreadState *tstate, _PyInterpreterFrame * frame)
tstate->exc_info = gen->gi_exc_state.previous_item;
gen->gi_exc_state.previous_item = NULL;
assert(frame->frame_obj == NULL || frame->frame_obj->f_frame == frame);
frame->previous = NULL;
_PyFrame_ClearExceptCode(frame);
_PyErr_ClearExcState(&gen->gi_exc_state);
frame->previous = NULL;
}
void