michael@0: function testLengthOnNonNativeProto()
michael@0: {
michael@0:   var o = {};
michael@0:   o.__proto__ = [3];
michael@0:   for (var j = 0; j < 5; j++)
michael@0:     o[0];
michael@0: 
michael@0:   var o2 = {};
michael@0:   o2.__proto__ = [];
michael@0:   for (var j = 0; j < 5; j++)
michael@0:     o2.length;
michael@0: 
michael@0:   function foo() { }
michael@0:   foo.__proto__ = [];
michael@0:   for (var j = 0; j < 5; j++)
michael@0:     foo.length;
michael@0: 
michael@0:   return "no assertion";
michael@0: }
michael@0: assertEq(testLengthOnNonNativeProto(), "no assertion");