michael@0: (function () {
michael@0:     function f()
michael@0:     {
michael@0:         this.y = w
michael@0:         this.y = (void 0)
michael@0:         Object
michael@0:     }
michael@0:     for (a in [0, 0, 0, 0])
michael@0:     {
michael@0:         new f
michael@0:     }
michael@0:     let w = {}
michael@0: })()
michael@0: 
michael@0: /* Make sure that MICs don't have the same bug. */
michael@0: x = Object();
michael@0: (function () {
michael@0:     function f()
michael@0:     {
michael@0:         x = w
michael@0:         x = (void 0)
michael@0:         Object
michael@0:     }
michael@0:     for (a in [0, 0, 0, 0])
michael@0:     {
michael@0:         new f
michael@0:     }
michael@0:     let w = {}
michael@0: })()
michael@0: /* Don't assert. */