==== tests/cases/compiler/assignmentCompatWithNumericIndexer2.ts (6 errors) ====
    // Derived type indexer must be subtype of base type indexer
    
    interface Base { foo: string; }
    interface Derived extends Base { bar: string; }
    interface Derived2 extends Derived { baz: string; }
    
    interface A {
        [x: number]: Base;
    }
    
    var a: A;
    var b: { [x: number]: Derived; }
    a = b;
    b = a; // error
    ~
!!! assignmentCompatWithNumericIndexer2.ts(14,1): error TS2012: Cannot convert 'A' to '{ [x: number]: Derived; }':
!!! 	Index signatures of types 'A' and '{ [x: number]: Derived; }' are incompatible:
!!! 		Type 'Base' is missing property 'bar' from type 'Derived'.
    
    var b2: { [x: number]: Derived2; }
    a = b2;
    b2 = a; // error
    ~~
!!! assignmentCompatWithNumericIndexer2.ts(18,1): error TS2012: Cannot convert 'A' to '{ [x: number]: Derived2; }':
!!! 	Index signatures of types 'A' and '{ [x: number]: Derived2; }' are incompatible:
!!! 		Type 'Base' is missing property 'baz' from type 'Derived2'.
    
    module Generics {
        interface A<T extends Base> {
            [x: number]: T;
        }
    
        interface B extends A<Base> {
            [x: number]: Derived; // ok
        }
    
        function foo<T extends Base>() {
            var a: A<T>;
            var b: { [x: number]: Derived; }
            a = b; // error
            ~
!!! assignmentCompatWithNumericIndexer2.ts(32,9): error TS2012: Cannot convert '{ [x: number]: Derived; }' to 'A<T>':
!!! 	Index signatures of types '{ [x: number]: Derived; }' and 'A<T>' are incompatible.
            b = a; // error
            ~
!!! assignmentCompatWithNumericIndexer2.ts(33,9): error TS2012: Cannot convert 'A<T>' to '{ [x: number]: Derived; }':
!!! 	Index signatures of types 'A<T>' and '{ [x: number]: Derived; }' are incompatible:
!!! 		Type 'Base' is missing property 'bar' from type 'Derived'.
    
            var b2: { [x: number]: Derived2; }
            a = b2; // error
            ~
!!! assignmentCompatWithNumericIndexer2.ts(36,9): error TS2012: Cannot convert '{ [x: number]: Derived2; }' to 'A<T>':
!!! 	Index signatures of types '{ [x: number]: Derived2; }' and 'A<T>' are incompatible.
            b2 = a; // error
            ~~
!!! assignmentCompatWithNumericIndexer2.ts(37,9): error TS2012: Cannot convert 'A<T>' to '{ [x: number]: Derived2; }':
!!! 	Index signatures of types 'A<T>' and '{ [x: number]: Derived2; }' are incompatible:
!!! 		Type 'Base' is missing property 'baz' from type 'Derived2'.
    
            var b3: { [x: number]: T; }
            a = b3; // ok
            b3 = a; // ok
        }
    }