Program received signal SIGABRT, Aborted.
0x00bea402 in __kernel_vsyscall ()
(gdb) bt
#0  0x00bea402 in __kernel_vsyscall ()
#1  0x00428fa0 in raise () from /lib/libc.so.6
#2  0x0042a8b1 in abort () from /lib/libc.so.6
#3  0x0045febb in __libc_message () from /lib/libc.so.6
#4  0x00467f41 in _int_free () from /lib/libc.so.6
#5  0x0046b580 in free () from /lib/libc.so.6
#6  0x081bb591 in Xfree ()
#7  0x00221a4a in fbDestroyPixmap () from /usr/lib/xorg/modules//libfb.so
#8  0x0099766b in ?? () from /usr/lib/xorg/modules//libexa.so
#9  0x0816f054 in ?? ()
#10 0x00a424e0 in ?? () from /usr/lib/xorg/modules/extensions//libextmod.so
#11 0x080825d5 in dixDestroyPixmap ()
#12 0x08072bed in FreeResource ()
#13 0x080841d3 in ProcFreePixmap ()
#14 0x0814efd1 in ?? ()
#15 0x0808936a in Dispatch ()
#16 0x080710a5 in main ()
(gdb)