DrawString (graphics=0x1237730, stringUnicode=0x11e5f84, length=12, font=0x12256c0, rc=0xbfffee30, fmt=0x1237970, brush=0x1237b30, CleanString=0x1237d70, StringDetails=0x1237ec0, data=0xbfffecd8) at graphics.c:2899
2899                                    cairo_show_text (graphics->ct, (const char *) String);
(gdb) next
entered _cairo_surface_set_clipCGBitmapContextGetBitsPerPixel: invalid context
cairo.c:93: failed assertion `status > CAIRO_STATUS_SUCCESS && status <= CAIRO_STATUS_LAST_STATUS'