==== tests/cases/compiler/assignmentCompatability11.ts (1 errors) ====
    module __test1__ {
        export interface interfaceWithPublicAndOptional<T,U> { one: T; two?: U; };  var obj4: interfaceWithPublicAndOptional<number,string> = { one: 1 };;
        export var __val__obj4 = obj4;
    }
    module __test2__ {
        export var obj = {two: 1};
        export var __val__obj = obj;
    }
    __test2__.__val__obj = __test1__.__val__obj4
    ~~~~~~~~~~~~~~~~~~~~
!!! Type 'interfaceWithPublicAndOptional<number, string>' is not assignable to type '{ two: number; }':
!!!   Types of property 'two' are incompatible:
!!!     Type 'string' is not assignable to type 'number'.