michael@0: function test(name, fn, val) {
michael@0:     gc();
michael@0:     var ok = {}, bad = {};
michael@0:     bad.__defineSetter__(name, fn);
michael@0:     var arr = [ok, ok, ok, ok, ok, bad];
michael@0: 
michael@0:     var log = '';
michael@0:     try {
michael@0:         for (var i = 0; i < arr.length; i++) {
michael@0:             arr[i][name] = val;
michael@0:             log += '.';
michael@0:         }
michael@0:     } catch (exc) {
michael@0:         log += 'E';
michael@0:     }
michael@0:     assertEq(log, '.....E');
michael@0: }
michael@0: 
michael@0: test("x", Function.prototype.call, null);  // TypeError: Function.prototype.call called on incompatible [object Object]
michael@0: test("y", Array, 0.1);                     // RangeError: invalid array length
michael@0: test(1, Function.prototype.call, null);  // TypeError: Function.prototype.call called on incompatible [object Object]
michael@0: test(1, Array, 0.1);                     // RangeError: invalid array length