=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/callSignatureAssignabilityInInheritance5.ts ===
// checking subtype relations for function types as it relates to contextual signature instantiation
// same as subtypingWithCallSignatures2 just with an extra level of indirection in the inheritance chain

class Base { foo: string; }
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>foo : string, Symbol(foo, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 12))

class Derived extends Base { bar: string; }
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>bar : string, Symbol(bar, Decl(callSignatureAssignabilityInInheritance5.ts, 4, 28))

class Derived2 extends Derived { baz: string; }
>Derived2 : Derived2, Symbol(Derived2, Decl(callSignatureAssignabilityInInheritance5.ts, 4, 43))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>baz : string, Symbol(baz, Decl(callSignatureAssignabilityInInheritance5.ts, 5, 32))

class OtherDerived extends Base { bing: string; }
>OtherDerived : OtherDerived, Symbol(OtherDerived, Decl(callSignatureAssignabilityInInheritance5.ts, 5, 47))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>bing : string, Symbol(bing, Decl(callSignatureAssignabilityInInheritance5.ts, 6, 33))

interface A { // T
>A : A, Symbol(A, Decl(callSignatureAssignabilityInInheritance5.ts, 6, 49))

    // M's
    a: (x: number) => number[];
>a : (x: number) => number[], Symbol(a, Decl(callSignatureAssignabilityInInheritance5.ts, 8, 13))
>x : number, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 10, 8))

    a2: (x: number) => string[];
>a2 : (x: number) => string[], Symbol(a2, Decl(callSignatureAssignabilityInInheritance5.ts, 10, 31))
>x : number, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 11, 9))

    a3: (x: number) => void;
>a3 : (x: number) => void, Symbol(a3, Decl(callSignatureAssignabilityInInheritance5.ts, 11, 32))
>x : number, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 12, 9))

    a4: (x: string, y: number) => string;
>a4 : (x: string, y: number) => string, Symbol(a4, Decl(callSignatureAssignabilityInInheritance5.ts, 12, 28))
>x : string, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 13, 9))
>y : number, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 13, 19))

    a5: (x: (arg: string) => number) => string;
>a5 : (x: (arg: string) => number) => string, Symbol(a5, Decl(callSignatureAssignabilityInInheritance5.ts, 13, 41))
>x : (arg: string) => number, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 14, 9))
>arg : string, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 14, 13))

    a6: (x: (arg: Base) => Derived) => Base;
>a6 : (x: (arg: Base) => Derived) => Base, Symbol(a6, Decl(callSignatureAssignabilityInInheritance5.ts, 14, 47))
>x : (arg: Base) => Derived, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 15, 9))
>arg : Base, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 15, 13))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))

    a7: (x: (arg: Base) => Derived) => (r: Base) => Derived;
>a7 : (x: (arg: Base) => Derived) => (r: Base) => Derived, Symbol(a7, Decl(callSignatureAssignabilityInInheritance5.ts, 15, 44))
>x : (arg: Base) => Derived, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 16, 9))
>arg : Base, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 16, 13))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>r : Base, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 16, 40))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a8: (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
>a8 : (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived, Symbol(a8, Decl(callSignatureAssignabilityInInheritance5.ts, 16, 60))
>x : (arg: Base) => Derived, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 9))
>arg : Base, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 13))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>y : (arg2: Base) => Derived, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 35))
>arg2 : Base, Symbol(arg2, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 40))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>r : Base, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 68))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a9: (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
>a9 : (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived, Symbol(a9, Decl(callSignatureAssignabilityInInheritance5.ts, 17, 88))
>x : (arg: Base) => Derived, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 9))
>arg : Base, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 13))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>y : (arg2: Base) => Derived, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 35))
>arg2 : Base, Symbol(arg2, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 40))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>r : Base, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 68))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a10: (...x: Derived[]) => Derived;
>a10 : (...x: Derived[]) => Derived, Symbol(a10, Decl(callSignatureAssignabilityInInheritance5.ts, 18, 88))
>x : Derived[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 19, 10))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a11: (x: { foo: string }, y: { foo: string; bar: string }) => Base;
>a11 : (x: { foo: string; }, y: { foo: string; bar: string; }) => Base, Symbol(a11, Decl(callSignatureAssignabilityInInheritance5.ts, 19, 38))
>x : { foo: string; }, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 10))
>foo : string, Symbol(foo, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 14))
>y : { foo: string; bar: string; }, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 29))
>foo : string, Symbol(foo, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 34))
>bar : string, Symbol(bar, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 47))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))

    a12: (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
>a12 : (x: Base[], y: Derived2[]) => Derived[], Symbol(a12, Decl(callSignatureAssignabilityInInheritance5.ts, 20, 71))
>x : Base[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 21, 10))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>y : Derived2[], Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 21, 25))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived2 : Derived2, Symbol(Derived2, Decl(callSignatureAssignabilityInInheritance5.ts, 4, 43))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a13: (x: Array<Base>, y: Array<Derived>) => Array<Derived>;
>a13 : (x: Base[], y: Derived[]) => Derived[], Symbol(a13, Decl(callSignatureAssignabilityInInheritance5.ts, 21, 64))
>x : Base[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 22, 10))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>y : Derived[], Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 22, 25))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a14: (x: { a: string; b: number }) => Object;
>a14 : (x: { a: string; b: number; }) => Object, Symbol(a14, Decl(callSignatureAssignabilityInInheritance5.ts, 22, 63))
>x : { a: string; b: number; }, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 23, 10))
>a : string, Symbol(a, Decl(callSignatureAssignabilityInInheritance5.ts, 23, 14))
>b : number, Symbol(b, Decl(callSignatureAssignabilityInInheritance5.ts, 23, 25))
>Object : Object, Symbol(Object, Decl(lib.d.ts, 92, 1), Decl(lib.d.ts, 223, 11))
}

interface B extends A {
>B : B, Symbol(B, Decl(callSignatureAssignabilityInInheritance5.ts, 24, 1))
>A : A, Symbol(A, Decl(callSignatureAssignabilityInInheritance5.ts, 6, 49))

    a: <T>(x: T) => T[];
>a : <T>(x: T) => T[], Symbol(a, Decl(callSignatureAssignabilityInInheritance5.ts, 26, 23))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 27, 8))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 27, 11))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 27, 8))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 27, 8))
}

// S's
interface I extends B {
>I : I, Symbol(I, Decl(callSignatureAssignabilityInInheritance5.ts, 28, 1))
>B : B, Symbol(B, Decl(callSignatureAssignabilityInInheritance5.ts, 24, 1))

    // N's
    a: <T>(x: T) => T[]; // ok, instantiation of N is a subtype of M, T is number
>a : <T>(x: T) => T[], Symbol(a, Decl(callSignatureAssignabilityInInheritance5.ts, 31, 23))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 33, 8))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 33, 11))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 33, 8))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 33, 8))

    a2: <T>(x: T) => string[]; // ok
>a2 : <T>(x: T) => string[], Symbol(a2, Decl(callSignatureAssignabilityInInheritance5.ts, 33, 24))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 34, 9))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 34, 12))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 34, 9))

    a3: <T>(x: T) => T; // ok since Base returns void
>a3 : <T>(x: T) => T, Symbol(a3, Decl(callSignatureAssignabilityInInheritance5.ts, 34, 30))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 35, 9))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 35, 12))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 35, 9))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 35, 9))

    a4: <T, U>(x: T, y: U) => T; // ok, instantiation of N is a subtype of M, T is string, U is number
>a4 : <T, U>(x: T, y: U) => T, Symbol(a4, Decl(callSignatureAssignabilityInInheritance5.ts, 35, 23))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 11))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 15))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 9))
>y : U, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 20))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 11))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 9))

    a5: <T, U>(x: (arg: T) => U) => T; // ok, U is in a parameter position so inferences can be made
>a5 : <T, U>(x: (arg: T) => U) => T, Symbol(a5, Decl(callSignatureAssignabilityInInheritance5.ts, 36, 32))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 11))
>x : (arg: T) => U, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 15))
>arg : T, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 19))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 11))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 9))

    a6: <T extends Base, U extends Derived>(x: (arg: T) => U) => T; // ok, same as a5 but with object type hierarchy
>a6 : <T extends Base, U extends Derived>(x: (arg: T) => U) => T, Symbol(a6, Decl(callSignatureAssignabilityInInheritance5.ts, 37, 38))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 9))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 24))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : (arg: T) => U, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 44))
>arg : T, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 48))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 24))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 9))

    a7: <T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U; // ok
>a7 : <T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U, Symbol(a7, Decl(callSignatureAssignabilityInInheritance5.ts, 38, 67))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 9))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 24))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : (arg: T) => U, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 44))
>arg : T, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 48))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 24))
>r : T, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 66))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 24))

    a8: <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U; // ok
>a8 : <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U, Symbol(a8, Decl(callSignatureAssignabilityInInheritance5.ts, 39, 77))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 9))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 24))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : (arg: T) => U, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 44))
>arg : T, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 48))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 24))
>y : (arg2: T) => U, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 61))
>arg2 : T, Symbol(arg2, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 66))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 24))
>r : T, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 85))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 24))

    a9: <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number }) => U) => (r: T) => U; // ok, same as a8 with compatible object literal
>a9 : <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number; }) => U) => (r: T) => U, Symbol(a9, Decl(callSignatureAssignabilityInInheritance5.ts, 40, 96))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 9))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 24))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : (arg: T) => U, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 44))
>arg : T, Symbol(arg, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 48))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 24))
>y : (arg2: { foo: string; bing: number; }) => U, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 61))
>arg2 : { foo: string; bing: number; }, Symbol(arg2, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 66))
>foo : string, Symbol(foo, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 73))
>bing : number, Symbol(bing, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 86))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 24))
>r : T, Symbol(r, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 113))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 9))
>U : U, Symbol(U, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 24))

    a10: <T extends Derived>(...x: T[]) => T; // ok
>a10 : <T extends Derived>(...x: T[]) => T, Symbol(a10, Decl(callSignatureAssignabilityInInheritance5.ts, 41, 124))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 42, 10))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : T[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 42, 29))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 42, 10))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 42, 10))

    a11: <T extends Base>(x: T, y: T) => T; // ok
>a11 : <T extends Base>(x: T, y: T) => T, Symbol(a11, Decl(callSignatureAssignabilityInInheritance5.ts, 42, 45))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 10))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>x : T, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 26))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 10))
>y : T, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 31))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 10))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 10))

    a12: <T extends Array<Base>>(x: Array<Base>, y: T) => Array<Derived>; // ok, less specific parameter type
>a12 : <T extends Base[]>(x: Base[], y: T) => Derived[], Symbol(a12, Decl(callSignatureAssignabilityInInheritance5.ts, 43, 43))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 44, 10))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>x : Base[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 44, 33))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>y : T, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 44, 48))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 44, 10))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))

    a13: <T extends Array<Derived>>(x: Array<Base>, y: T) => T; // ok, T = Array<Derived>, satisfies constraint, contextual signature instantiation succeeds
>a13 : <T extends Derived[]>(x: Base[], y: T) => T, Symbol(a13, Decl(callSignatureAssignabilityInInheritance5.ts, 44, 73))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 10))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Derived : Derived, Symbol(Derived, Decl(callSignatureAssignabilityInInheritance5.ts, 3, 27))
>x : Base[], Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 36))
>Array : T[], Symbol(Array, Decl(lib.d.ts, 1000, 23), Decl(lib.d.ts, 1171, 11))
>Base : Base, Symbol(Base, Decl(callSignatureAssignabilityInInheritance5.ts, 0, 0))
>y : T, Symbol(y, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 51))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 10))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 10))

    a14: <T>(x: { a: T; b: T }) => T; // ok, best common type yields T = {} but that's satisfactory for this signature
>a14 : <T>(x: { a: T; b: T; }) => T, Symbol(a14, Decl(callSignatureAssignabilityInInheritance5.ts, 45, 63))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 10))
>x : { a: T; b: T; }, Symbol(x, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 13))
>a : T, Symbol(a, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 17))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 10))
>b : T, Symbol(b, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 23))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 10))
>T : T, Symbol(T, Decl(callSignatureAssignabilityInInheritance5.ts, 46, 10))
}