open class B<X, Y : X> {
    constructor(x: X, y: Y) {}
    constructor(x: X, s: String) {}
    constructor(y: Y, i: Int) : this(y, "") {}
}

class A<T1, T2 : T1> : B<T1, T2> {
    <caret>constructor(x: T2): super(x, "") {}
}



Resolved call:

Candidate descriptor: constructor B<X, Y : X>(x: X, s: String) defined in B
Resulting descriptor: constructor B<X, Y : T1>(x: T1, s: String) defined in B

Explicit receiver kind = NO_EXPLICIT_RECEIVER
Dispatch receiver = NO_RECEIVER
Extension receiver = NO_RECEIVER

Value arguments mapping:

SUCCESS  x : T1 = x
SUCCESS  s : String = ""