I'm using swift, and getting the same error over and over, did anyone knows how to solve it?

this is meu received error: Compiler Message Error reading result file.You should use exception handling concepts.

and this is my working code:

func stringToInt(inputString: String) throws -> Int {
    guard let value = Int(inputString) else {
        throw StringToIntTypecastingError.BadString
    }
    return value
}