Comment 2 for bug 1118648

StacktraceTop:
 do_blit_copypixels (type=6144, dsty=0, dstx=0, height=768, width=1360, srcy=0, srcx=0, ctx=0x8787f0) at intel_pixel_copy.c:196
 intelCopyPixels (ctx=0x8787f0, srcx=0, srcy=0, width=1360, height=768, destx=0, desty=0, type=6144) at intel_pixel_copy.c:225
 _mesa_CopyPixels (srcx=0, srcy=0, width=1360, height=768, type=6144) at ../../../../../src/mesa/main/drawpix.c:271
 ~basic_stringstream (this=0x7fff34742160, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /usr/include/c++/4.7/sstream:546
 PrivateShaderCache::createVertexShader (this=<optimized out>, params=...) at /build/buildd/compiz-0.9.9~daily13.02.08/plugins/opengl/src/shadercache.cpp:187