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Garbage collection of the BytesIO buffer object raises an unraisable exception #111331
Description
Bug report
The following code
from io import BytesIO
memio = BytesIO(b"1234567890")
buf = memio.getbuffer()
del memio
a = [buf]
del buf
a.append(a)
del a
import gc
gc.collect()raises an unraisable exception:
Exception ignored in: <_io.BytesIO object at 0x7fe2404d0d70>
Traceback (most recent call last):
File "<python-input-9>", line 1, in <module>
BufferError: Existing exports of data: object cannot be re-sized
Unraisable exception during garbage collection is a sign of a bug.
It is only for the C implementation. The Python implementation raises an unraisable exception in different situation. See #111330.
Activity
gh-111331: Allow closing BytesIO with exported buffers (GH-155383)
pythongh-111331: Allow closing BytesIO with exported buffers (pythonG…