Bug#407601: trackballs: segfault after pressing Start Game, mouse is unuseable afterwards in

[Brice Goglin]

Michael Musenbrock wrote:
> I send you the gdb output, put i'm not familiar with debugging programs,
> maybe you can give me advise, to get more informations out of gdb.
>   

Ok, I reproduced the bug, there is a backtrace below, just look at it to
see how to do.

I guess I'll need to forward this backtrace upstream too...

Brice



$ gdb trackballs
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".

(gdb) r
Starting program: /usr/games/trackballs 
(no debugging symbols found)
[...]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1218623808 (LWP 5830)]
0xb71e5b64 in _save_upgrade_vertex (ctx=0x8155098, attr=2, newsz=3) at tnl/t_save_api.c:406
406	tnl/t_save_api.c: No such file or directory.
	in tnl/t_save_api.c
(gdb) bt full
#0  0xb71e5b64 in _save_upgrade_vertex (ctx=0x8155098, attr=2, newsz=3) at tnl/t_save_api.c:406
	tnl = (TNLcontext *) 0x8396d70
	oldsz = 0
	i = <value optimized out>
	tmp = <value optimized out>
	__PRETTY_FUNCTION__ = "_save_upgrade_vertex"
#1  0xb71e66aa in do_choose (attr=2, sz=3, attr_func=0xb71e41b0 <save_attrib_2_3>, choose1=0xb71e77f0 <save_choose_2_1>, choose2=0xb71e77a0 <save_choose_2_2>, choose3=0xb71e7750 <save_choose_2_3>, 
    choose4=0xb71e7700 <save_choose_2_4>, v=0xbfc9c91c) at tnl/t_save_api.c:561
	ctx = (GLcontext *) 0x839a000
	tnl = (TNLcontext *) 0x8396d70
	i = <value optimized out>
	id = {0, 0, 0, 1}
#2  0xb71e7793 in save_choose_2_3 (v=0xbfc9c91c) at tnl/t_save_api.c:665
No locals.
#3  0xb71e30f3 in _save_Normal3f (x=0, y=0, z=1) at tnl/t_save_api.c:840
	v = {0, 0, 1}
#4  0xb727ee9c in loopback_Normal3dv (v=0xbfc9ca70) at main/api_loopback.c:387
No locals.
#5  0x08056bd2 in ?? ()
No symbol table info available.
#6  0x08057af4 in ?? ()
No symbol table info available.
#7  0x0804e7e7 in ?? ()
No symbol table info available.
#8  0x0804cc49 in ?? ()
No symbol table info available.
#9  0xb7e9a5d2 in scm_boot_guile () from /usr/lib/libguile.so.12
No symbol table info available.
#10 0x0804beca in ?? ()
No symbol table info available.
#11 0xb79a8ea8 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#12 0x0804bc61 in ?? ()
No symbol table info available.
(gdb) q
The program is running.  Exit anyway? (y or n) y