STINNER Victor <victor.stin...@haypocalc.com> added the comment:

> the issue is that on 64-bit gcc builds with enough optimization, 
> the argument "PyFrameObject *f" is passed as a register, 
> and that gets clobbered at various locations within the
> implementation of PyEval_EvalFrameEx.

test_gdb fails (Unable to read information on python frame) on my i386 computer 
(32 bits) with -O1 (but it doesn't with -O0). I'm using Debian Sid: gcc 4.4.3 
and gdb 7.1.

----------
title: test_gdb - "(unable to read python frame information)" mismatch -> 
test_gdb, gdb/libpython.py: Unable to read information on python frame

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue8482>
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