src/third_party/mozjs-45/js/src/tests/js1_7/geniter/gen-with-call-obj.js

var foo;

function gen() {
    var x = 0;
    foo = function() { return x++; }
    for (var i = 0; i < 10; ++i)
        yield x++;
}

var j = 0;
for (i in gen())
    assertEq(i, j++);

// now mess up the stack

function f1(x) {
    var a, b, c, d, e, f, g;
    return x <= 0 ? 0 : f1(x-1);
}
f1(10);
function f2(x) {
    var a = x, b = x;
    return x <= 0 ? 0 : f2(x-1);
}
f2(10);

// now observe gen's call object (which should have been put)

gc();
assertEq(foo(), 10);
gc();
assertEq(foo(), 11);
gc();
assertEq(foo(), 12);

reportCompare(true,true);