michael@0: function testBranchingUnstableObject() {
michael@0:   var x = {s: "a"};
michael@0:   var t = "";
michael@0:   for (var i=0; i < 100; ++i) {
michael@0:       if (i == 51)
michael@0:       {
michael@0:         x.s = 5;
michael@0:       }
michael@0:       t += x.s;
michael@0:   }
michael@0:   return t.length;
michael@0: }
michael@0: assertEq(testBranchingUnstableObject(), 100);