michael@0: try {
michael@0:     var x
michael@0:     for (x in [x])
michael@0:     gczeal(2)
michael@0:     new NaN
michael@0: } catch(e) {}
michael@0: (function() {
michael@0:     for (a in [Boolean(), x.t]) {}
michael@0: } (function() {}))
michael@0: