tests/cases/conformance/es6/for-ofStatements/for-of17.ts(2,6): error TS2322: Type 'number' is not assignable to type 'string'. ==== tests/cases/conformance/es6/for-ofStatements/for-of17.ts (1 errors) ==== var v: string; for (v of new NumberIterator) { } // Should succeed ~ !!! error TS2322: Type 'number' is not assignable to type 'string'. class NumberIterator { next() { return { value: 0, done: false }; } [Symbol.iterator]() { return this; } }