==== tests/cases/compiler/errorOnContextuallyTypedReturnType.ts (2 errors) ====
    var n1: () => boolean = function () { }; // expect an error here
        ~~
!!! Type '() => void' is not assignable to type '() => boolean':
!!!   Type 'void' is not assignable to type 'boolean'.
    var n2: () => boolean = function ():boolean { }; // expect an error here
                                        ~~~~~~~
!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.