Program received signal SIGSEGV, Segmentation fault.
pixman_blt_sse2 (__B=<value optimized out>, __P=<value optimized out>) at pixman-sse2.c:5359
5359		    save_128_aligned ((__m128i*)(d),    xmm0);
(gdb) bt
#0  0x0068a236 in pixman_blt_sse2 (__B=<value optimized out>, __P=<value optimized out>) from /usr/lib/libpixman-1.so.0
#1  0x0068a401 in sse2_blt (imp=<value optimized out>, src_bits=<value optimized out>, dst_bits=<value optimized out>, src_stride=<value optimized out>, 
    dst_stride=<value optimized out>, src_bpp=<value optimized out>, dst_bpp=<value optimized out>, src_x=<value optimized out>, src_y=<value optimized out>, 
    dst_x=<value optimized out>, dst_y=<value optimized out>, width=<value optimized out>, height=<value optimized out>) at pixman-sse2.c:5735
#2  0x00652384 in _pixman_implementation_blt (imp=<value optimized out>, src_bits=<value optimized out>, dst_bits=<value optimized out>, src_stride=<value optimized out>, 
    dst_stride=<value optimized out>, src_bpp=<value optimized out>, dst_bpp=<value optimized out>, src_x=<value optimized out>, src_y=<value optimized out>, 
    dst_x=<value optimized out>, dst_y=<value optimized out>, width=<value optimized out>, height=<value optimized out>) at pixman-implementation.c:250
#3  0x00677609 in pixman_blt (src_bits=<value optimized out>, dst_bits=<value optimized out>, src_stride=<value optimized out>, dst_stride=<value optimized out>, 
    src_bpp=<value optimized out>, dst_bpp=<value optimized out>, src_x=<value optimized out>, src_y=<value optimized out>, dst_x=<value optimized out>, 
    dst_y=<value optimized out>, width=<value optimized out>, height=<value optimized out>) at pixman.c:236
#4  0x001dbf0f in fbCopyNtoN (pSrcDrawable=0xa1c69f8, pDstDrawable=0xa1d5508, pGC=0x9ed1988, pbox=0xbf9a8c80, nbox=0, dx=1033, dy=0, reverse=0, upsidedown=0, bitplane=0, 
    closure=0x0) at fbcopy.c:97
#5  0x081eddcc in miCopyRegion (pSrcDrawable=0xa1c69f8, pDstDrawable=0xa1d5508, pGC=0x9ed1988, pDstRegion=0xbf9a8c80, dx=1033, dy=0, copyProc=0x1dbcdf <fbCopyNtoN>, bitPlane=0, 
    closure=0x0) at micopy.c:138
#6  0x081ee275 in miDoCopy (pSrcDrawable=0xa1c69f8, pDstDrawable=0xa1d5508, pGC=0x9ed1988, xIn=1033, yIn=0, widthSrc=90, heightSrc=24, xOut=0, yOut=0, 
    copyProc=0x1dbcdf <fbCopyNtoN>, bitPlane=0, closure=0x0) at micopy.c:338
#7  0x001dc9b9 in fbCopyArea (pSrcDrawable=0xa1c69f8, pDstDrawable=0xa1d5508, pGC=0x9ed1988, xIn=0, yIn=0, widthSrc=90, heightSrc=24, xOut=0, yOut=0) at fbcopy.c:344
#8  0x001e2286 in copy_drawable (pDraw=0xa1c69f8) at fbpict.c:305
#9  0x001e22f4 in create_bits_picture (pict=0xa17cbb8, has_clip=1, is_src=1) at fbpict.c:333
#10 0x001e2779 in image_from_pict (pict=0xa17cbb8, has_clip=1, is_src=1) at fbpict.c:488
#11 0x001e1d26 in fbComposite (op=1 '\001', pSrc=0xa17cbb8, pMask=0x0, pDst=0xa17db38, xSrc=-1, ySrc=-1, xMask=0, yMask=0, xDst=0, yDst=0, width=1, height=1) at fbpict.c:166
#12 0x00a7e9ab in ExaCheckComposite (op=1 '\001', pSrc=0xa17cbb8, pMask=0x0, pDst=0xa17db38, xSrc=-1, ySrc=-1, xMask=0, yMask=0, xDst=0, yDst=0, width=1, height=1)
    at exa_unaccel.c:445
#13 0x00a7c79f in exaComposite (op=1 '\001', pSrc=0xa17cbb8, pMask=0x0, pDst=0xa17db38, xSrc=-1, ySrc=-1, xMask=0, yMask=0, xDst=0, yDst=0, width=1, height=1) at exa_render.c:1067
#14 0x0814d1f2 in damageComposite (op=1 '\001', pSrc=0xa17cbb8, pMask=0x0, pDst=0xa17db38, xSrc=-1, ySrc=-1, xMask=0, yMask=0, xDst=0, yDst=0, width=1, height=1) at damage.c:643
#15 0x0813c7f0 in CompositePicture (op=1 '\001', pSrc=0xa17cbb8, pMask=0x0, pDst=0xa17db38, xSrc=-1, ySrc=-1, xMask=0, yMask=0, xDst=0, yDst=0, width=1, height=1)
    at picture.c:1718
#16 0x0810ad2c in compNewPixmap (pWin=0xa17d618, x=1032, y=-1, w=1, h=1) at compalloc.c:541
#17 0x0810adf9 in compAllocPixmap (pWin=0xa17d618) at compalloc.c:565
#18 0x081b4dd0 in compCheckRedirect (pWin=0xa17d618) at compwindow.c:168
#19 0x081b5096 in compRealizeWindow (pWin=0xa17d618) at compwindow.c:249
#20 0x08068078 in RealizeTree (pWin=0xa17d618) at window.c:2555
#21 0x080683e4 in MapWindow (pWin=0xa17d618, client=0xa165e98) at window.c:2650
#22 0x080857a1 in ProcMapWindow (client=0xa165e98) at dispatch.c:843
#23 0x0808483b in Dispatch () at dispatch.c:445
#24 0x08062903 in main (argc=6, argv=0xbf9a95c4, envp=0xbf9a95e0) at main.c:285
(gdb) frame 4
#4  0x001dbf0f in fbCopyNtoN (pSrcDrawable=0xa1c69f8, pDstDrawable=0xa1d5508, pGC=0x9ed1988, pbox=0xbf9a8c80, nbox=0, dx=1033, dy=0, reverse=0, upsidedown=0, bitplane=0, 
    closure=0x0) at fbcopy.c:97
97		    if (!pixman_blt ((uint32_t *)src, (uint32_t *)dst, srcStride, dstStride, srcBpp, dstBpp,
(gdb) print ((PixmapPtr)pSrcDrawable)->devPrivate.ptr
$1 = (pointer) 0x0
(gdb) print src
$2 = (FbBits *) 0xb68d0000
(gdb) print *pbox
$3 = {x1 = 0, y1 = 0, x2 = 90, y2 = 24}
(gdb) print *src
Cannot access memory at address 0xb68d0000
(gdb) cont