michael@0: try {
michael@0:   (function() {
michael@0:     (Object.defineProperty(this, "x", ({
michael@0:       set: function() {}
michael@0:     })))
michael@0:   })()
michael@0: } catch(e) {}
michael@0: for (var a = 0; a < 4; a++) {
michael@0:   x = 7
michael@0: }
michael@0: 
michael@0: /* Don't bogus assert. */
michael@0: