Comment 2 for bug 939947

StacktraceTop:
 ?? ()
 _pixman_image_get_solid (imp=<optimized out>, image=<optimized out>, format=<optimized out>) at ../../pixman/pixman-image.c:892
 sse2_composite_over_n_8_8888 (imp=<optimized out>, info=<optimized out>) at ../../pixman/pixman-sse2.c:3132
 pixman_image_composite32 (op=<optimized out>, src=<optimized out>, mask=<optimized out>, dest=<optimized out>, src_x=22, src_y=26, mask_x=0, mask_y=0, dest_x=22, dest_y=26, width=13, height=17) at ../../pixman/pixman.c:712
 _composite_spans (closure=<optimized out>, dst=<optimized out>, dst_format=<optimized out>, op=CAIRO_OPERATOR_OVER, pattern=<optimized out>, dst_x=22, dst_y=0, extents=0x7f6eb6ded690, clip_region=0x0) at /build/buildd/cairo-1.10.2/src/cairo-image-surface.c:3510