tests/cases/compiler/multipleInheritance.ts(9,21): error TS1174: Classes can only extend a single class.
tests/cases/compiler/multipleInheritance.ts(18,21): error TS1174: Classes can only extend a single class.
tests/cases/compiler/multipleInheritance.ts(34,7): error TS2415: Class 'Baad' incorrectly extends base class 'Good'.
  Types of property 'g' are incompatible.
    Type '(n: number) => number' is not assignable to type '() => number'.
tests/cases/compiler/multipleInheritance.ts(35,12): error TS2425: Class 'Good' defines instance member property 'f', but extended class 'Baad' defines it as instance member function.


==== tests/cases/compiler/multipleInheritance.ts (4 errors) ====
    class B1 {
        public x;
    }
    
    class B2 {
        public x;
    }
    
    class C extends B1, B2 { // duplicate member
                        ~~
!!! error TS1174: Classes can only extend a single class.
    }
    
    class D1 extends B1 {
    }
    
    class D2 extends B2 {
    }
    
    class E extends D1, D2 { // nope, duplicate member
                        ~~
!!! error TS1174: Classes can only extend a single class.
    }
    
    class N {
        public y:number;
    }
    
    class ND extends N { // any is assignable to number
        public y;
    }
    
    class Good {
        public f:() => number = function() { return 0; }
        public g() { return 0; }
    }
    
    class Baad extends Good {
          ~~~~
!!! error TS2415: Class 'Baad' incorrectly extends base class 'Good'.
!!! error TS2415:   Types of property 'g' are incompatible.
!!! error TS2415:     Type '(n: number) => number' is not assignable to type '() => number'.
        public f(): number { return 0; }
               ~
!!! error TS2425: Class 'Good' defines instance member property 'f', but extended class 'Baad' defines it as instance member function.
        public g(n:number) { return 0; }
    }