michael@0: // setVariable can create a new property on a with block's bindings object, if
michael@0: // it is shadowing an existing property on the prototype chain.
michael@0: 
michael@0: var g = newGlobal();
michael@0: var dbg = Debugger(g);
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     var env = frame.environment.find("x");
michael@0:     env.setVariable("x", 2);
michael@0: };
michael@0: g.eval("var obj1 = {x: 1}, obj2 = Object.create(obj1), z; with (obj2) { debugger; z = x; }");
michael@0: assertEq(g.obj1.x, 1);
michael@0: assertEq(g.obj2.x, 2);
michael@0: assertEq(g.z, 2);
michael@0: 
michael@0: // The property created by setVariable is like the one created by ordinary
michael@0: // assignment in a with-block.
michael@0: var desc = Object.getOwnPropertyDescriptor(g.obj2, "x");
michael@0: assertEq(desc.configurable, true);
michael@0: assertEq(desc.enumerable, true);
michael@0: assertEq(desc.writable, true);
michael@0: assertEq(desc.value, 2);