#include <cairo.h>

cairo_user_data_key_t whatever;

int
main (int argc, char *argv[])
{
        cairo_surface_t *surface;
        cairo_t *cr;
	cairo_pattern_t *radpat;

        surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 120, 120);
        cr = cairo_create (surface);
	radpat = cairo_pattern_create_rgb (0, 0, 0);

        // REMOVE THIS AND IT WONT CRASH
        cairo_pattern_set_user_data (radpat, &whatever, &whatever, 0);

        // SEGFAULT HERE
	cairo_mask (cr, radpat);

        return 0;
}