[issue16550] pickletools.py treats 32bit lengths as signed, but pickle.py as unsigned

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Lib/test/pickletester.py contains some bigmem tests, they can be modified to cover issue12848 and this issue. But I can't run this tests.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16550>
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