gh-148914: Fix memoization of in-band PickleBuffer in the Python implementation#149052
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serhiy-storchaka wants to merge 2 commits intopython:mainfrom
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gh-148914: Fix memoization of in-band PickleBuffer in the Python implementation#149052serhiy-storchaka wants to merge 2 commits intopython:mainfrom
serhiy-storchaka wants to merge 2 commits intopython:mainfrom
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…n implementation Previously, identical PickleBuffers did not preserve identity. Also, empty writable PickleBuffer memoized an empty bytearray object in place of b'' which is a singleton in CPython, so the following references to b'' were unpickled as an empty bytearray object.
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picnixz
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Apr 27, 2026
| with self.subTest(proto=proto, array_type=array_type, s=s, independent=False): | ||
| b = array_type(s) | ||
| p = self.dumps((b, b), proto) | ||
| import pickletools; pickletools.dis(p) |
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I think it's also a debugging relicate :)
| if self.py_version >= (3, 4): | ||
| array_types += [ZeroCopyBytearray] | ||
| for proto in protocols: | ||
| for proto in protocols[5:]: |
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Previously, identical PickleBuffers did not preserve identity. Also, empty writable PickleBuffer memoized an empty bytearray object in place of b'' which is a singleton in CPython, so the following references to b'' were unpickled as an empty bytearray object.