Type of optionals cannot be inferred correctly in swift 2.2

Question

Problem:

When running the following code under Xcode 7.3 with swift 2.2, the compiler is unable to correctly infer the type of the optional:

Answer 1

This seems to be a bug. The minimal example is the following:

func genericMethod<T>(property: T?) {
    print(T) // String

    let stringNil = Optional<String>.None

    print(stringNil is String?) // true (warning - always true)    
    print(stringNil is T?) // true

    let intNil = Optional<Int>.None

    print(intNil is String?) // false (warning - always fails)
    print(intNil is T?) // true - BUG
}

genericMethod("")