crash when considering intersection of 2 polygons which don't intersect

[qalvapps]

Not sure if I was just unlucky, or if this fix is 100% but seems to solve my probs:
I added the 'if' statement after the assert in (MKPolygon *) polygonWithGPCPolygon:(gpc_polygon *) gpcPolygon interiorPolygons:(NSArray *)interiorPolygons , like so

NSAssert( gpcPolygon != NULL, @"attempt to create path from NULL gpcPolygon");

if (gpcPolygon->contour == NULL) {
    return nil;
}

[justbcuz]

Thank you very much for finding this issue. Can you provide me an example to reproduce this error. I am trying to see if the error is in polygonWithGPCPolygon or when I convert a MKPolygon to a gpcPolygon. Thanks.