Function testExceptionPriority

deps/v8/test/mjsunit/iterable-foreach.js:78–99

()

// Exception in 'return' vs Exception in callback
function testExceptionPriority() {
  let iterable = {
    [Symbol.iterator]() {
      return {
        next() { return { value: 1, done: false }; },
        return() {
            throw new Error("Exception in return");
        }
      };
    }
  };

  try {
    %IterableForEach(iterable, (x) => {
      throw new Error("Exception in callback");
    });
  } catch (e) {
    // The spec says if completion is a throw completion, return ? completion.
    // So "Exception in callback" should be rethrown, suppressing "Exception in return".
    assertEquals("Exception in callback", e.message);
  }
}
testExceptionPriority();

// Stack overflow