tests/cases/compiler/yieldExpression1.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.


==== tests/cases/compiler/yieldExpression1.ts (1 errors) ====
    function* foo() {
            ~
!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
        yield
    }