relates to:

• SR-10198 Cannot override more than one superclass declaration

Issue Description:

Overriding a base class function and introducing an overload in the derived class based solely on the inout status of the parameter causes the compiler to think that the method is overridden twice.

This appears to happen regardless of whether an inout parameter is overridden or a non-inout parameter is overridden. This worked prior to upgrading to XCode 10.2.

Below, XCode reports the 'f(i: Int)' function declared in Derived as already overridden.

class Base {
    func f(i: inout Int) {
        
    }
}


class Derived : Base {
    override func f(i: inout Int) {
        
    }
    
    func f(i: Int) {
        
    }
}