struct RangeError: Error {
    
}

let numbers = [-62, 1, 6, 10, 9, 22, 0, -1, 5]
let cancellable = numbers.publisher
    .tryLast {
        guard $0 != 0  else {throw RangeError()}
        return true
    }
    .sink(
        receiveCompletion: { print ("completion: \($0)", terminator: " ") },
        receiveValue: { print ("\($0)", terminator: " ") }
    )