Program received signal SIGSEGV, Segmentation fault.
memcpy_blt (src=0xb3d5a000, dst=0xb5b22008, bpp=4, src_stride=4096, 
    dst_stride=2888, src_x=221, src_y=545, dst_x=221, dst_y=545, width=1, 
    height=1) at blt.c:195
195				*(uint32_t *)dst_bytes = *(uint32_t *)src_bytes;
(gdb) bt
#0  memcpy_blt (src=0xb3d5a000, dst=0xb5b22008, bpp=4, src_stride=4096, 
    dst_stride=2888, src_x=221, src_y=545, dst_x=221, dst_y=545, width=1, 
    height=1) at blt.c:195
#1  0x00177070 in read_boxes_inplace (kgem=<optimized out>, 
    bo=<optimized out>, src_dx=0, src_dy=0, pixmap=0x8e09a18, dst_dx=0, 
    dst_dy=0, box=0x8e35d40, n=173) at sna_io.c:103
#2  0x0017798d in sna_read_boxes (sna=0x8a65d50, src_bo=0x8d71be8, src_dx=0, 
    src_dy=0, dst=0x8e09a18, dst_dx=0, dst_dy=0, box=0x8e34e78, nbox=646)
    at sna_io.c:156
#3  0x00152703 in _sna_pixmap_move_to_cpu (pixmap=0x8e09a18, flags=2)
    at sna_accel.c:1037
#4  0x001541d7 in sna_drawable_move_region_to_cpu (drawable=0x8e09a18, 
    region=0xbf801e6c, flags=2) at sna_accel.c:1240
#5  0x001592ef in sna_copy_boxes (src=0x8e09a18, dst=0x8d68aa8, gc=0x8d68978, 
    box=0xbf801f94, n=1, dx=0, dy=0, reverse=0, upsidedown=0, bitplane=0, 
    closure=0x0) at sna_accel.c:3582
#6  0x081aa4bb in miCopyRegion (pSrcDrawable=0x8e09a18, 
    pDstDrawable=0x8d68aa8, pGC=0x8d68978, pDstRegion=0xbf801f94, dx=0, dy=0, 
    copyProc=0x158bd0 <sna_copy_boxes>, bitPlane=0, closure=0x0)
    at micopy.c:137
#7  0x081aa9a0 in miDoCopy (pSrcDrawable=0x8e09a18, pDstDrawable=0x8d68aa8, 
    pGC=0x8d68978, xIn=0, yIn=0, widthSrc=722, heightSrc=544, xOut=0, yOut=0, 
    copyProc=0x158bd0 <sna_copy_boxes>, bitPlane=0, closure=0x0)
---Type <return> to continue, or q <return> to quit---
    at micopy.c:334
#8  0x0015893b in sna_copy_area (src=0x8e09a18, dst=0x8d68aa8, gc=0x8d68978, 
    src_x=0, src_y=0, width=722, height=544, dst_x=0, dst_y=0)
    at sna_accel.c:3766
#9  0x08159c57 in damageCopyArea (pSrc=0x8e09a18, pDst=0x8d68aa8, 
    pGC=0x8d68978, srcx=0, srcy=0, width=722, height=544, dstx=0, dsty=0)
    at damage.c:864
#10 0x08071c86 in ProcCopyArea (client=0x8e14578) at dispatch.c:1651
#11 0x08076195 in Dispatch () at dispatch.c:439
#12 0x0806439a in main (argc=6, argv=0xbf802274, envp=0xbf802290) at main.c:287
(gdb) quit
A debugging session is active.
P