michael@0: function mp(g) {
michael@0:   ans = ''
michael@0:   for (var i = 0; i < 5; ++i) {
michael@0:     ans += g();
michael@0:   }
michael@0:   return ans;
michael@0: }
michael@0: 
michael@0: var f = eval("(function() { var k = 5; function g() { return k; } k = 6; mp(g); delete k; return mp(g); })");
michael@0: assertEq(f(), "66666");