Comment 2 for bug 833619

StacktraceTop:
 FT_Set_Transform (face=0x7ff134ead9db, matrix=0x7fff8f9ad520, delta=0x0) at /build/buildd/freetype-2.4.4/freetype-2.4.4/src/base/ftobjs.c:469
 _cairo_ft_unscaled_font_set_scale (unscaled=0x19d5e90, scale=<optimized out>) at /build/buildd/cairo-1.10.2/src/cairo-ft-font.c:780
 _cairo_ft_font_face_scaled_font_create (abstract_font_face=0x1a1c740, font_matrix=0x7ff134e6a1a0, ctm=0x7ff134e6a228, options=0x7fff8f9ad860, font_out=0x7fff8f9ad628) at /build/buildd/cairo-1.10.2/src/cairo-ft-font.c:1845
 INT_cairo_scaled_font_create (font_face=0x1a1c740, font_matrix=<optimized out>, ctm=<optimized out>, options=0x7fff8f9ad860) at /build/buildd/cairo-1.10.2/src/cairo-scaled-font.c:1053
 _cairo_gstate_ensure_scaled_font (gstate=0x7ff134e6a138) at /build/buildd/cairo-1.10.2/src/cairo-gstate.c:1803