==== tests/cases/compiler/genericConstructorFunction1.ts (2 errors) ====
    function f1<T>(args: T) {
        var v1: { [index: string]: new (arg: T) => Date };
        var v2 = v1['test'];
        v2(args); 
        ~~~~~~~~
!!! Value of type 'new (arg: T) => Date' is not callable. Did you mean to include 'new'?
        return new v2(args); // used to give error
    }
    
    
    interface I1<T> { new (arg: T): Date };
    function f2<T>(args: T) {
        var v1: { [index: string]: I1<T> };
        var v2 = v1['test'];
        var y = v2(args); 
                ~~~~~~~~
!!! Value of type 'I1<T>' is not callable. Did you mean to include 'new'?
        return new v2(args); // used to give error
    }