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generator.close() doesn't clear frame on newly created generators #142766
Description
Bug report
Bug description:
Since Python 3.12, generator.close() and generator.gi_frame.clear() do not clear the generator's frame, if the generator is in the FRAME_CREATED state.
The following passes on Python 3.11 and earlier and fails on Python 3.12+
class DetectDeletion:
deleted = False
def __del__(self):
DetectDeletion.deleted = True
def gen(x): yield 1
g = gen(DetectDeletion())
g.close() # or alternatively: g.gi_frame.clear()
assert DetectDeletion.deleted
del gIntroduced in:
CPython versions tested on:
3.11, 3.12, 3.14, 3.13, 3.15
Operating systems tested on:
No response
Activity
colesbury commentedon Dec 15, 2025
cc @markshannon - I think this is a bug, but I want to check in case this was an intentional behavior change.
markshannon commentedon Dec 16, 2025
It's a bug.
Want to fix it or shall I?
colesbury commentedon Dec 16, 2025
I can make the PR
pythongh-142766: Clear frame when `generator.close()` is called
Merge branch 'pythongh-142766-gen-close' into pythongh-120321-gen-fra…
gh-142766: Clear frame when `generator.close()` is called (gh-142838)
pythongh-142766: Clear frame when `generator.close()` is called (pyth…
[3.13] pythongh-142766: Clear frame when `generator.close()` is called (
[3.14] gh-142766: Clear frame when `generator.close()` is called (gh-…
[3.13] gh-142766: Clear frame when `generator.close()` is called (gh-…