[New-bugs-announce] [issue9696] xdrlib's pack_int generates DeprecationWarnings for negative in-range values

[David Powell]

New submission from David Powell <powelliptic at gmail.com>:

The problem is easy to reproduce:

>>> import xdrlib
>>> p = xdrlib.Packer()
>>> p.pack_int(-1)
__main__:1: DeprecationWarning: struct integer overflow masking is deprecated

The cause is xdrlib.Packer uses the same pack operation for both
signed and unsigned integers...

    def pack_uint(self, x):
        self.__buf.write(struct.pack('>L', x))

    pack_int = pack_uint

...and the unsigned struct.pack('>L', x) gags on the negative value.

----------
components: Extension Modules
messages: 115034
nosy: dep
priority: normal
severity: normal
status: open
title: xdrlib's pack_int generates DeprecationWarnings for negative in-range values
type: behavior
versions: Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9696>
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