michael@0: 
michael@0: /* Handle recompilation on undefined properties and array holes. */
michael@0: 
michael@0: var v = {};
michael@0: if (typeof v == 'string')
michael@0:   v.x = 0;
michael@0: function prop(v)
michael@0: {
michael@0:   var z = v.x + 1;
michael@0:   assertEq(z, NaN);
michael@0: }
michael@0: prop(v);
michael@0: 
michael@0: v = [];
michael@0: v[0] = 0;
michael@0: v[1] = 1;
michael@0: v[3] = 3;
michael@0: v[4] = 4;
michael@0: function elem(x)
michael@0: {
michael@0:   var x = "";
michael@0:   for (var i = 0; i < 5; i++)
michael@0:     x += v[i];
michael@0:   assertEq(x, "01undefined34");
michael@0: }
michael@0: elem(v);