[New-bugs-announce] [issue30281] set stop default to -PY_SSIZE_T_MAX-1 in PySlice_Unpack

[Xiang Zhang]

New submission from Xiang Zhang:

The default value for stop in PySlice_Unpack should be -PY_SSIZE_T_MAX-1. Otherwise a sequence of length PY_SSIZE_T_MAX could get a wrong slicelength when doing L[::-1].

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components: Interpreter Core
messages: 293097
nosy: serhiy.storchaka, xiang.zhang
priority: normal
severity: normal
stage: patch review
status: open
title: set stop default to -PY_SSIZE_T_MAX-1 in PySlice_Unpack
type: behavior
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30281>
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