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gh-111049: Fix crash during garbage collection of the BytesIO buffer object (GH-111221)

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Serhiy Storchaka 2023-12-14 12:04:23 +02:00 • committed by GitHub
parent 4d5d9acb22
commit bb36f72efc
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3 changed files with 27 additions and 10 deletions
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21
Lib/test/test_memoryio.py
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@ -6,10 +6,12 @@ BytesIO -- for bytes
import unittest
from test import support
import gc
import io
import _pyio as pyio
import pickle
import sys
import weakref
class IntLike:
def __init__(self, num):
@ -477,6 +479,25 @@ class PyBytesIOTest(MemoryTestMixin, MemorySeekTestMixin, unittest.TestCase):
buf2.release()
memio.write(b'x')
def test_getbuffer_gc_collect(self):
memio = self.ioclass(b"1234567890")
buf = memio.getbuffer()
memiowr = weakref.ref(memio)
bufwr = weakref.ref(buf)
# Create a reference loop.
a = [buf]
a.append(a)
# The Python implementation emits an unraisable exception.
with support.catch_unraisable_exception():
del memio
del buf
del a
# The C implementation emits an unraisable exception.
with support.catch_unraisable_exception():
gc.collect()
self.assertIsNone(memiowr())
self.assertIsNone(bufwr())
def test_read1(self):
buf = self.buftype("1234567890")
self.assertEqual(self.ioclass(buf).read1(), buf)