File: assignmentCompatWithGenericCallSignaturesWithOptionalParameters.symbols

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=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts ===
// call signatures in derived types must have the same or fewer optional parameters as the target for assignment

module ClassTypeParam {
>ClassTypeParam : Symbol(ClassTypeParam, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 0, 0))

    class Base<T> {
>Base : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        a: () => T;
>a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        a2: (x?: T) => T;
>a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        a3: (x: T) => T;
>a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        a4: (x: T, y?: T) => T;
>a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 18))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        a5: (x?: T, y?: T) => T;
>a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 8, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 8, 19))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

        init = () => {
>init : Symbol(Base.init, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 8, 32))

            this.a = () => null; // ok, same T of required params
>this.a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))

            this.a = (x?: T) => null; // ok, same T of required params
>this.a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 12, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a = (x: T) => null; // error, too many required params
>this.a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a : Symbol(Base.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 13, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a2 = () => null; // ok, same T of required params
>this.a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))

            this.a2 = (x?: T) => null; // ok, same T of required params
>this.a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 16, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a2 = (x: T) => null; // ok, same number of params
>this.a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a2 : Symbol(Base.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 4, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 17, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a3 = () => null; // ok, fewer required params
>this.a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))

            this.a3 = (x?: T) => null; // ok, fewer required params
>this.a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 20, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a3 = (x: T) => null; // ok, same T of required params
>this.a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 21, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a3 = (x: T, y: T) => null;  // error, too many required params
>this.a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a3 : Symbol(Base.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 5, 25))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 22, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 22, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a4 = () => null; // ok, fewer required params
>this.a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))

            this.a4 = (x?: T, y?: T) => null; // ok, fewer required params
>this.a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 25, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 25, 29))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a4 = (x: T) => null; // ok, same T of required params
>this.a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 26, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a4 = (x: T, y: T) => null;  // ok, same number of params
>this.a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a4 : Symbol(Base.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 6, 24))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 27, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 27, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))


            this.a5 = () => null; // ok, fewer required params
>this.a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))

            this.a5 = (x?: T, y?: T) => null; // ok, fewer required params
>this.a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 31, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 31, 29))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a5 = (x: T) => null; // ok, all present params match
>this.a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 32, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))

            this.a5 = (x: T, y: T) => null;  // ok, same number of params
>this.a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>this : Symbol(Base, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 2, 23))
>a5 : Symbol(Base.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 7, 31))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 33, 23))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 33, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 3, 15))
        }
    }
}

module GenericSignaturesInvalid {
>GenericSignaturesInvalid : Symbol(GenericSignaturesInvalid, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 36, 1))

    class Base2 {
>Base2 : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 38, 33))

        a: <T>() => T;
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 12))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 12))

        a2: <T>(x?: T) => T;
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 13))

        a3: <T>(x: T) => T;
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 13))

        a4: <T>(x: T, y?: T) => T;
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 13))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 21))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 13))

        a5: <T>(x?: T, y?: T) => T;
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 13))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 45, 13))
    }

    class Target<T> {
>Target : Symbol(Target, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 46, 5))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))

        a: () => T;
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))

        a2: (x?: T) => T;
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))

        a3: (x: T) => T;
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))

        a4: (x: T, y?: T) => T;
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 18))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))

        a5: (x?: T, y?: T) => T;
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 53, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 53, 19))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 17))
    }


    function foo<T>() {
>foo : Symbol(foo, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 54, 5))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 57, 17))

        var b: Base2;
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>Base2 : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 38, 33))

        var t: Target<T>;
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>Target : Symbol(Target, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 46, 5))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 57, 17))

        // all errors
        b.a = t.a;
>b.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>t.a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))

        b.a = t.a2;
>b.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>t.a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))

        b.a = t.a3;
>b.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>t.a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))

        b.a = t.a4;
>b.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>t.a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))

        b.a = t.a5;
>b.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 40, 17))
>t.a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))

        b.a2 = t.a;
>b.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>t.a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))

        b.a2 = t.a2;
>b.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>t.a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))

        b.a2 = t.a3;
>b.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>t.a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))

        b.a2 = t.a4;
>b.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>t.a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))

        b.a2 = t.a5;
>b.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 41, 22))
>t.a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))

        b.a3 = t.a;
>b.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>t.a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))

        b.a3 = t.a2;
>b.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>t.a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))

        b.a3 = t.a3;
>b.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>t.a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))

        b.a3 = t.a4;
>b.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>t.a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))

        b.a3 = t.a5;
>b.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 42, 28))
>t.a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))

        b.a4 = t.a;
>b.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>t.a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))

        b.a4 = t.a2;
>b.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>t.a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))

        b.a4 = t.a3;
>b.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>t.a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))

        b.a4 = t.a4;
>b.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>t.a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))

        b.a4 = t.a5;
>b.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 43, 27))
>t.a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))

        b.a5 = t.a;
>b.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>t.a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a : Symbol(Target.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 48, 21))

        b.a5 = t.a2;
>b.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>t.a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a2 : Symbol(Target.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 49, 19))

        b.a5 = t.a3;
>b.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>t.a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a3 : Symbol(Target.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 50, 25))

        b.a5 = t.a4;
>b.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>t.a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a4 : Symbol(Target.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 51, 24))

        b.a5 = t.a5;
>b.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>b : Symbol(b, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 58, 11))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 44, 34))
>t.a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
>t : Symbol(t, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 59, 11))
>a5 : Symbol(Target.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 52, 31))
    }
}

module GenericSignaturesValid {
>GenericSignaturesValid : Symbol(GenericSignaturesValid, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 92, 1))

    class Base2 {
>Base2 : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))

        a: <T>() => T;
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 12))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 12))

        a2: <T>(x?: T) => T;
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 13))

        a3: <T>(x: T) => T;
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 13))

        a4: <T>(x: T, y?: T) => T;
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 13))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 21))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 13))

        a5: <T>(x?: T, y?: T) => T;
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 13))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 16))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 13))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 13))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 13))

        init = () => {
>init : Symbol(Base2.init, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 101, 35))

            this.a = <T>() => null; // ok, same T of required params
>this.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 104, 22))

            this.a = <T>(x?: T) => null; // ok, same T of required params
>this.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 105, 22))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 105, 25))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 105, 22))

            this.a = <T>(x: T) => null; // error, too many required params
>this.a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a : Symbol(Base2.a, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 96, 17))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 106, 22))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 106, 25))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 106, 22))

            this.a2 = <T>() => null; // ok, same T of required params
>this.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 108, 23))

            this.a2 = <T>(x?: T) => null; // ok, same T of required params
>this.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 109, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 109, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 109, 23))

            this.a2 = <T>(x: T) => null; // ok, same number of params
>this.a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a2 : Symbol(Base2.a2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 97, 22))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 110, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 110, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 110, 23))

            this.a3 = <T>() => null; // ok, fewer required params
>this.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 112, 23))

            this.a3 = <T>(x?: T) => null; // ok, fewer required params
>this.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 113, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 113, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 113, 23))

            this.a3 = <T>(x: T) => null; // ok, same T of required params
>this.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 114, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 114, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 114, 23))

            this.a3 = <T>(x: T, y: T) => null;  // error, too many required params
>this.a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a3 : Symbol(Base2.a3, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 98, 28))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 115, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 115, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 115, 23))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 115, 31))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 115, 23))

            this.a4 = <T>() => null; // ok, fewer required params
>this.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 117, 23))

            this.a4 = <T>(x?: T, y?: T) => null; // ok, fewer required params
>this.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 118, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 118, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 118, 23))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 118, 32))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 118, 23))

            this.a4 = <T>(x: T) => null; // ok, same T of required params
>this.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 119, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 119, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 119, 23))

            this.a4 = <T>(x: T, y: T) => null;  // ok, same number of params
>this.a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a4 : Symbol(Base2.a4, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 99, 27))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 120, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 120, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 120, 23))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 120, 31))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 120, 23))


            this.a5 = <T>() => null; // ok, fewer required params
>this.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 123, 23))

            this.a5 = <T>(x?: T, y?: T) => null; // ok, fewer required params
>this.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 124, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 124, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 124, 23))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 124, 32))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 124, 23))

            this.a5 = <T>(x: T) => null; // ok, all present params match
>this.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 125, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 125, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 125, 23))

            this.a5 = <T>(x: T, y: T) => null;  // ok, same number of params
>this.a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>this : Symbol(Base2, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 94, 31))
>a5 : Symbol(Base2.a5, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 100, 34))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 126, 23))
>x : Symbol(x, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 126, 26))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 126, 23))
>y : Symbol(y, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 126, 31))
>T : Symbol(T, Decl(assignmentCompatWithGenericCallSignaturesWithOptionalParameters.ts, 126, 23))
        }
    }
}