[issue4935] Segmentation fault in bytearray tests

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Here is a patch. The idea is to use unsigned arithmetic instead of
signed, and to check for overflows by comparing with PY_SSIZE_T_MAX.

(the exact reason of the crash is unknown, it looks like either a
compiler bug or a mis-optimization as (i < 0) returns 0 while i is
-0x7FFFFFFF)

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keywords: +patch
stage:  -> patch review
Added file: http://bugs.python.org/file12724/issue4935.patch

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