Fatal error converting invalid longitude

[hishma]

A fatal error occurs when converting a CLLocation or a CLLocationCoordinate2D with an invalid longitude to a UTMCoordinate .

For example:

let coordinate = CLLocationCoordinate2D(latitude: 90, longitude: -180.1)
let utm = coordinate.utmCoordinate()

CLFatal error: Double value cannot be converted to UInt because the result would be less than UInt.min

This is due in part to the unfortunate fact that you can actually create an invalid CLLocationCoordinate2D.

And error is not raised when using an invalid latitude by the way.