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=== tests/cases/compiler/optionalConstructorArgInSuper.ts ===
class Base {
>Base : Base
constructor(opt?) { }
>opt : any
foo(other?) { }
>foo : (other?: any) => void
>other : any
}
class Derived extends Base {
>Derived : Derived
>Base : Base
}
var d = new Derived(); // bug caused an error here, couldn't select overload
>d : Derived
>new Derived() : Derived
>Derived : typeof Derived
var d2: Derived;
>d2 : Derived
d2.foo();
>d2.foo() : void
>d2.foo : (other?: any) => void
>d2 : Derived
>foo : (other?: any) => void
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