(gdb) bt
#0  0xb7ff9424 in __kernel_vsyscall ()
#1  0xb7cb03d0 in raise () from /lib/i686/cmov/libc.so.6
#2  0xb7cb3a85 in abort () from /lib/i686/cmov/libc.so.6
#3  0x080ad3a5 in ddxGiveUp () at ../../../../hw/xfree86/common/xf86Init.c:1417
#4  0x0813b5fd in AbortServer () at ../../os/log.c:397
#5  0x0813bbfe in FatalError (f=0x81c9150 "Caught signal %d.  Server aborting\n") at ../../os/log.c:522
#6  0x080c1c73 in xf86SigHandler (signo=11) at ../../../../hw/xfree86/common/xf86Events.c:387
#7  <signal handler called>
#8  0xb68fce82 in exaFillRegionSolid (pDrawable=0x9b306c0, pRegion=0x9c2fde0, pixel=16777215, planemask=4294967295, alu=3, 
    clientClipType=0) at ../../exa/exa_accel.c:975
#9  0xb68fe726 in exaPolyFillRect (pDrawable=0x9b306c0, pGC=0x98f5aa8, nrect=1, prect=0x9c6eb68) at ../../exa/exa_accel.c:763
#10 0x0817a8c4 in damagePolyFillRect (pDrawable=0x9b306c0, pGC=0x98f5aa8, nRects=1, pRects=0x9c6eb68)
    at ../../../miext/damage/damage.c:1404
#11 0x08111a31 in miPaintWindow (pWin=0x9b306c0, prgn=0x9bcb380, what=0) at ../../mi/miexpose.c:629
#12 0x08111d9a in miWindowExposures (pWin=0x9b306c0, prgn=0x9bcb380, other_exposed=0x0) at ../../mi/miexpose.c:500
#13 0xb7ff0087 in DRIWindowExposures (pWin=0x9b306c0, prgn=0x9bcb380, bsreg=0x0) at ../../../../hw/xfree86/dri/dri.c:1863
#14 0x080cb332 in xf86XVWindowExposures (pWin=0x9b306c0, reg1=0x9bcb380, reg2=0x0) at ../../../../hw/xfree86/common/xf86xv.c:1054
#15 0x08129a24 in miHandleValidateExposures (pWin=0x9b14800) at ../../mi/miwindow.c:245
#16 0x08129648 in miSlideAndSizeWindow (pWin=0x9b30638, x=1010, y=269, w=<value optimized out>, h=<value optimized out>, pSib=0x9b39df0)
    at ../../mi/miwindow.c:675
#17 0x08142c78 in compResizeWindow (pWin=0x9b30638, x=10, y=243, w=241, h=52, pSib=0x9b39df0) at ../../composite/compwindow.c:406
#18 0x080781fc in ConfigureWindow (pWin=0x9b30638, mask=15, vlist=0x9ca7bbc, client=0x9b0ff10) at ../../dix/window.c:2403
#19 0x0808bd52 in ProcConfigureWindow (client=0x9b0ff10) at ../../dix/dispatch.c:741
#20 0x0808c79f in Dispatch () at ../../dix/dispatch.c:437
#21 0x08071ada in main (argc=3, argv=0xbfe1ea74, envp=Cannot access memory at address 0x1000007
) at ../../dix/main.c:397