[issue19881] Fix bigmem pickle tests

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2612ea573ff7 by Alexandre Vassalotti in branch 'default':
Issue #19881: Fix bad pickling of large bytes in cpickle.
http://hg.python.org/cpython/rev/2612ea573ff7

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19881>
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