[New-bugs-announce] [issue24714] Crash with string_at(None)

Michael Toews report at bugs.python.org
Sat Jul 25 11:40:48 CEST 2015

New submission from Michael Toews:

On Debian x64 stable with Python 2.7 and 3.4, the following causes a segmentation fault:

from ctypes import string_at

On Windows 64-bit with Python 2.7 it raises WindowsError and Python 3.3 raises OSError, both showing a message "access violation reading 0x0000000000000000", but it does not crash.

The above behavior was found when reading a result from a C API that can be either a zero-terminated string or NULL.

components: ctypes
messages: 247325
nosy: mwtoews
priority: normal
severity: normal
status: open
title: Crash with string_at(None)
type: crash
versions: Python 2.7, Python 3.3, Python 3.4

Python tracker <report at bugs.python.org>

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