[GEM-dev] Multiple window branch crashes Mesa

[Frank Barknecht]

Hi,

in a discussion with IOhannes at LAC he asked me to try the
multiple_window branch of Gem to see if this crashes Gem with newer
Mesa free drivers as well. I now did so and it crashes, too. This is
with Debian's 6.5.1-0.5 drivers. I didn't test the 6.5.2 branch, as
last time I did, it wasn't rendering anything at all but still
crashing with normal Gem.

(Btw: The new Ubuntu Feisty comes with mesa 6.5.2, the new stable
Debian has 6.5.1, so the number of people may increase who experience
the crash/no rendering issue, if they upgrade and have chipsets using
the free Mesa drivers like for Intel chips.)

Here's a bit of logging/gdb output when doing [create, 1( and then [0,
destroy(:

Direct Rendering enabled!
destroy A
destroy B
destroy C
destroy D
destroy E
destroy F
destroy F

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1211517248 (LWP 24805)]
0xb54f0af0 in ?? ()
(gdb) bt
#0  0xb54f0af0 in ?? ()
#1  0xb7765d1c in glXDestroyContext () from /usr/lib/libGL.so.1
#2  0xb7767e40 in glXMakeCurrentReadSGI () from /usr/lib/libGL.so.1
#3  0xb77680d3 in glXMakeCurrent () from /usr/lib/libGL.so.1
#4  0xb7b7dbd5 in gemwindow::destroyMess () from
/usr/lib/pd/extra/Gem/Gem.pd_linux
#5  0xb7b7d734 in gemwindow::destroyMessCallback () from
/usr/lib/pd/extra/Gem/Gem.pd_linux
#6  0x0809fd15 in pd_typedmess (x=0x88, s=0x80, argc=0,
argv=0x810e750) at m_class.c:728
Previous frame inner to this frame (corrupt stack?)

Ciao
-- 
 Frank Barknecht                 _ ______footils.org_ __goto10.org__