[issue12848] pickle.py treats 32bit lengths as signed, but _pickle.c as unsigned
Martin v. Löwis
report at bugs.python.org
Sat Nov 17 16:41:26 CET 2012
Martin v. Löwis added the comment:
IMO, the right solution is to finish PEP 3154, and support large strings in the format.
For the time being, I'd claim that signed length in the existing implementations are just a bug, and that unsigned lengths are the intended semantics of these opcodes. I can't see anything that is gained by allowing negative lengths.
OTOH, I also think that it won't matter much in practive: if you try to unpickle a string with more than 2GiB on a 32-bit system, chances are really high that you run out of memory. So whether any bug fix needs to be backported, I don't know.
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