tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(41,19): error TS2429: Interface 'I2<T, U>' incorrectly extends interface 'A':
  Types of property 'a2' are incompatible:
    Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]':
      Types of parameters 'x' and 'x' are incompatible:
        Type 'T' is not assignable to type 'number'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(50,19): error TS2429: Interface 'I4' incorrectly extends interface 'A':
  Types of property 'a8' are incompatible:
    Type 'new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U' is not assignable to type 'new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived':
      Types of parameters 'y' and 'y' are incompatible:
        Type '(arg2: { foo: number; }) => any' is not assignable to type '(arg2: Base) => Derived':
          Types of parameters 'arg2' and 'arg2' are incompatible:
            Type '{ foo: number; }' is not assignable to type 'Base':
              Types of property 'foo' are incompatible:
                Type 'number' is not assignable to type 'string'.


==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts (2 errors) ====
    // checking subtype relations for function types as it relates to contextual signature instantiation
    // error cases
    
    module Errors {
        class Base { foo: string; }
        class Derived extends Base { bar: string; }
        class Derived2 extends Derived { baz: string; }
        class OtherDerived extends Base { bing: string; }
    
        module WithNonGenericSignaturesInBaseType {
            // base type with non-generic call signatures
            interface A {
                a2: new (x: number) => string[];
                a7: new (x: (arg: Base) => Derived) => (r: Base) => Derived2;
                a8: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
                a10: new (...x: Base[]) => Base;
                a11: new (x: { foo: string }, y: { foo: string; bar: string }) => Base;
                a12: new (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
                a14: {
                    new (x: number): number[];
                    new (x: string): string[];
                };
                a15: new (x: { a: string; b: number }) => number;
                a16: {
                    // type of parameter is overload set which means we can't do inference based on this type
                    new (x: {
                        new (a: number): number;
                        new (a?: number): number;
                    }): number[];
                    new (x: {
                        new (a: boolean): boolean;
                        new (a?: boolean): boolean;
                    }): boolean[];
                };
            }
    
            interface I extends A {
                a2: new <T, U>(x: T) => U[]; // error, contextual signature instantiation doesn't relate return types so U is {}, not a subtype of string[]
            }
    
            interface I2<T, U> extends A {
                      ~~
!!! error TS2429: Interface 'I2<T, U>' incorrectly extends interface 'A':
!!! error TS2429:   Types of property 'a2' are incompatible:
!!! error TS2429:     Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]':
!!! error TS2429:       Types of parameters 'x' and 'x' are incompatible:
!!! error TS2429:         Type 'T' is not assignable to type 'number'.
                a2: new (x: T) => U[]; // error, no contextual signature instantiation since I2.a2 is not generic
            }
    
            interface I3 extends A {
                // valid, no inferences for V so it defaults to Derived2
                a7: new <T extends Base, U extends Derived, V extends Derived2>(x: (arg: T) => U) => (r: T) => V;
            }
    
            interface I4 extends A {
                      ~~
!!! error TS2429: Interface 'I4' incorrectly extends interface 'A':
!!! error TS2429:   Types of property 'a8' are incompatible:
!!! error TS2429:     Type 'new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U' is not assignable to type 'new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived':
!!! error TS2429:       Types of parameters 'y' and 'y' are incompatible:
!!! error TS2429:         Type '(arg2: { foo: number; }) => any' is not assignable to type '(arg2: Base) => Derived':
!!! error TS2429:           Types of parameters 'arg2' and 'arg2' are incompatible:
!!! error TS2429:             Type '{ foo: number; }' is not assignable to type 'Base':
!!! error TS2429:               Types of property 'foo' are incompatible:
!!! error TS2429:                 Type 'number' is not assignable to type 'string'.
                a8: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U; // error, type mismatch
            }
    
            interface I4B extends A {
                a10: new <T extends Derived>(...x: T[]) => T; // valid, parameter covariance works even after contextual signature instantiation
            }
    
            interface I4C extends A {
                a11: new <T extends Derived>(x: T, y: T) => T; // valid, even though x is a Base, parameter covariance works even after contextual signature instantiation
            }
    
            interface I4E extends A {
                a12: new <T extends Array<Derived2>>(x: Array<Base>, y: Array<Base>) => T; // valid, no inferences for T, defaults to Array<Derived2>
            }
    
            interface I6 extends A {
                a15: new <T>(x: { a: T; b: T }) => T; // error, T is {} which isn't an acceptable return type
            }
    
            interface I7 extends A {
                a15: new <T extends Base>(x: { a: T; b: T }) => number; // error, T defaults to Base, which is not compatible with number or string
            }
    
            interface I8 extends A {
                // ok, we relate each signature of a16 to b16, and within that, we make inferences from two different signatures in the respective A.a16 signature
                a16: new <T>(x: new (a: T) => T) => T[];
            }
        }
    
        module WithGenericSignaturesInBaseType {
            // base type has generic call signature
            interface B {
                a2: new <T>(x: T) => T[];
            }
    
            interface I6 extends B {
                a2: new <T>(x: T) => string[]; // error
            }
    
            // base type has generic call signature
            interface C {
                a2: new <T>(x: T) => string[];
            }
    
            interface I7 extends C {
                a2: new <T>(x: T) => T[]; // error
            }
    
            // base type has a generic call signature with overloads
            interface D {
                a14: {
                    new <T extends Derived>(x: T): number[];
                    new <U extends Base>(x: U): number[];
                };
            }
    
            interface I8 extends D {
                a14: new <T extends Base>(x: T) => number[];
            }
        }
    }