michael@0: // Observably different visits to the same with-statement produce distinct Environments.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function f(a, obj) { with (obj) return function () { return a; }; }");
michael@0: var dbg = Debugger(g);
michael@0: var hits = 0;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     // Even though the two visits to the with-statement have the same target
michael@0:     // object, Math, the environments are observably different.
michael@0:     var f1 = frame.eval("f(1, Math);").return;
michael@0:     var f2 = frame.eval("f(2, Math);").return;
michael@0:     assertEq(f1.environment !== f2.environment, true);
michael@0:     assertEq(f1.object, f2.object);
michael@0:     assertEq(f1.call().return, 1);
michael@0:     assertEq(f2.call().return, 2);
michael@0:     hits++;
michael@0: };
michael@0: g.eval("debugger;");
michael@0: assertEq(hits, 1);