michael@0: 
michael@0: /* Non-reentrant closure used in an invoke session. */
michael@0: 
michael@0: var last = null;
michael@0: 
michael@0: var a = [1,2,3,4,5,6,7,8];
michael@0: var b = a.map(function(x) {
michael@0:     x++;
michael@0:     var res = last ? last() : 0;
michael@0:     last = function() { return x; };
michael@0:     return res;
michael@0:   });
michael@0: 
michael@0: assertEq("" + b, "0,2,3,4,5,6,7,8");