929104 - The Array Iterator prototype is not an Array Iterator

Status: RESOLVED DUPLICATE of bug 924059

(Core :: JavaScript Engine, defect)

Description

[Jason Orendorff [:jorendorff]]

The object returned by GlobalObject::getOrCreateArrayIteratorPrototype should have the default Class, &JSObject::class_.

(The spec doesn't give this object any of the internal data properties that ArrayIterators have. Call this object's non-generic methods should throw a TypeError.)

load(libdir + "iteration.js");
var aip = Object.getPrototypeOf([][std_iterator]());
assertEq(Object.prototype.toString.call(aip), "[object Object]");

Comment 1

[Jason Orendorff [:jorendorff]]

Sorry, that's a bogus test. toString.call(aip) should return "[object Array Iterator]", but aip still isn't an array iterator, so:

    assertThrowsInstanceOf(() => aip.next(), TypeError);

This already throws a TypeError, sort of by accident. The error message is bogus:

    js> aip.next()
    typein:11:0 TypeError: a is undefined

should be something about calling a non-generic method on an incompatible prototype object.