[issue12848] pickle.py treats 32bit lengths as signed, but _pickle.c as unsigned

[Antoine Pitrou]

Antoine Pitrou added the comment:

I'd like to add that anyone wanting to serialize large data will certainly be using _pickle (or its ancestor cPickle), since using pickle.py is probably excruciatingly slow. Meaning we should favour preserving _pickle/cPickle's behaviour over preserving pickle.py's behaviour here.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12848>
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