[issue10001] ~Py_buffer.obj field is undocumented, though not hidden

[Lenard Lindstrom]

New submission from Lenard Lindstrom <len-l at telus.net>:

Python 3.2a2+ (py3k:85072M, Sep 29 2010, 12:11:17) (from SVN)
[GCC 4.4.5 20100728 (prerelease)] on linux2 (Debian squeeze)

The ~Py_buffer.obj field is undocumented. Yet memoryview, that acts as a wrapper, includes the field in gc traversal. Also, if the field is not initialized by bf_getbuffer its value can be indeterminate. For memoryview the gc can crash (see attached C demo program).

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components: Interpreter Core
files: bufobj.c.gz
messages: 117754
nosy: kermode
priority: normal
severity: normal
status: open
title: ~Py_buffer.obj field is undocumented, though not hidden
versions: Python 3.2
Added file: http://bugs.python.org/file19069/bufobj.c.gz

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