exit status: 1 with stderr:
<stdin>:3:9: error: cannot invoke initializer for type 'NSURL' with no arguments let u = NSURL() ^ <stdin>:3:9: note: overloads for 'NSURL' exist with these partially matching parameter lists: (coder: NSCoder), (fileURLWithPath: String, isDirectory: Bool, relativeTo: URL?), (fileURLWithPath: String, relativeTo: URL?), (fileURLWithPath: String, isDirectory: Bool), (fileURLWithPath: String), (fileURLWithFileSystemRepresentation: UnsafePointer<Int8>, isDirectory: Bool, relativeTo: URL?), (string: String), (string: String, relativeTo: URL?), (dataRepresentation: Data, relativeTo: URL?), (absoluteURLWithDataRepresentation: Data, relativeTo: URL?) let u = NSURL() ^