Program received signal SIGSEGV, Segmentation fault.
sna_do_copy (src=src@entry=0x2311390, dst=dst@entry=0x2311390, gc=gc@entry=0x243cb10, sx=sx@entry=0, sy=sy@entry=15,
    width=width@entry=568, height=height@entry=356, dx=dx@entry=0, dy=dy@entry=0, copy=0x7f08fb706fc0 <sna_self_copy_boxes>,
    bitPlane=bitPlane@entry=0, closure=closure@entry=0x0) at sna_accel.c:6097
6097            if (!box_intersect(&region.extents, &gc->pCompositeClip->extents)) {
(gdb) bt f
#0  sna_do_copy (src=src@entry=0x2311390, dst=dst@entry=0x2311390, gc=gc@entry=0x243cb10, sx=sx@entry=0, sy=sy@entry=15,
    width=width@entry=568, height=height@entry=356, dx=dx@entry=0, dy=dy@entry=0, copy=0x7f08fb706fc0 <sna_self_copy_boxes>,
    bitPlane=bitPlane@entry=0, closure=closure@entry=0x0) at sna_accel.c:6097
        clip = <optimized out>
        region = {extents = {x1 = 0, y1 = 0, x2 = 568, y2 = 356}, data = 0x0}
        src_extents = <optimized out>
        expose = <optimized out>
#1  0x00007f08fb6fb0db in sna_copy_area (src=0x2311390, dst=0x2311390, gc=0x243cb10, src_x=0, src_y=15, width=568, height=356,
    dst_x=0, dst_y=0) at sna_accel.c:6247
        copy = <optimized out>
#2  0x0000000000439191 in ProcCopyArea (client=0x22a5640) at dispatch.c:1626
        pDst = 0x2311390
        pSrc = 0x2311390
        pGC = 0x243cb10
        stuff = 0x2506fec
        pRgn = <optimized out>
        rc = <optimized out>
#3  0x000000000043cc3e in Dispatch () at dispatch.c:432
        clientReady = 0x1fbf670
        result = <optimized out>
        client = 0x22a5640
        nready = 0
        icheck = 0x817310 <checkForInput>
        start_tick = 80
#4  0x000000000042c1ba in main (argc=12, argv=0x7fff77b56778, envp=<optimized out>) at main.c:298
        i = <optimized out>
        alwaysCheckForInput = {0, 1}