[issue9614] _pickle is not entirely 64-bit safe

[Antoine Pitrou]

New submission from Antoine Pitrou <pitrou at free.fr>:

A number of legitimate warnings get emitted under a 64-bit Windows build (in many places, _pickle uses ints or longs instead of "Py_ssize_t" variable to store various lengths and sizes):

1>..\Modules\_pickle.c(284) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(301) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(461) : warning C4244: '+=' : conversion from 'Py_ssize_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(628) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'long', possible loss of data
1>..\Modules\_pickle.c(647) : warning C4267: '=' : conversion from 'size_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(1320) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(1558) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'int', possible loss of data
1>..\Modules\_pickle.c(1806) : warning C4244: '=' : conversion from 'Py_ssize_t' to 'int', possible loss of data

----------
components: Extension Modules
messages: 113986
nosy: alexandre.vassalotti, pitrou
priority: normal
severity: normal
status: open
title: _pickle is not entirely 64-bit safe
type: behavior
versions: Python 3.1, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9614>
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