Program received signal SIGPIPE, Broken pipe.
0xf77d3430 in __kernel_vsyscall ()
(gdb) c
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0xf732b47d in DrawableGone (glxPriv=0x88477e8, xid=31457729) at glxext.c:133
133         if (glxPriv->drawId != glxPriv->pDraw->id) {
(gdb) print glxPriv
$1 = (__GLXdrawable *) 0x88477e8
(gdb) print glxPriv->pDraw
$2 = (DrawablePtr) 0x8b256a0
(gdb) print glxPriv->pDraw->id
Cannot access memory at address 0x8b256a4
(gdb) where
#0  0xf732b47d in DrawableGone (glxPriv=0x88477e8, xid=31457729)
    at glxext.c:133
#1  0x08095dbd in FreeClientResources (client=0x8405fe0) at resource.c:859
#2  0x0806ce49 in CloseDownClient (client=0x8405fe0) at dispatch.c:3490
#3  0x08071de5 in Dispatch () at dispatch.c:442
#4  0x0806619a in main (argc=8, argv=0xffd342c4, envp=0xffd342e8) at main.c:291
(gdb) ^Z
[1]+  Stopped                 gdb /usr/local/bin/Xorg
# cat > ~adam/gdb.trace