13   function restore(object, oldProto) {  argument
14     delete object[Symbol.unscopables];
15     delete object.x;
16     delete object.x_;
17     delete object.y;
18     delete object.z;
19     Object.setPrototypeOf(object, oldProto);
61       var object = getObject(i);
62       var oldObjectProto = Object.getPrototypeOf(object);
63       f(object);
64       restore(object, oldObjectProto);
69         var object = getObject(i);
71         if (object === proto) {
74         var oldObjectProto = Object.getPrototypeOf(object);
76         f(object, proto);
77         restore(object, oldObjectProto);
120 function TestBasics(object) {  argument
124   object.x = 4;
125   object.y = 5;
127   with (object) {
133   object[Symbol.unscopables] = {x: true};  variable in TestBasics
134   with (object) {
140   object[Symbol.unscopables] = {x: 0, y: true};  variable in TestBasics
141   with (object) {
150 function TestUnscopableChain(object) {  argument
152   object.x = 2;
154   with (object) {
158   object[Symbol.unscopables] = {  variable in TestUnscopableChain
161   with (object) {
168 function TestBasicsSet(object) {  argument
170   object.x = 2;
172   with (object) {
176   object[Symbol.unscopables] = {x: true};  variable in TestBasicsSet
177   with (object) {
184   assertEquals(2, object.x);
189 function TestOnProto(object, proto) {  argument
195   Object.setPrototypeOf(object, proto);
196   object.y = 5;
198   with (object) {
205   with (object) {
211   object[Symbol.unscopables] = {y: true};  variable in TestOnProto
212   with (object) {
219   object[Symbol.unscopables] = {x: true};  variable in TestOnProto
220   with (object) {
229 function TestSetBlockedOnProto(object, proto) {  argument
231   object.x = 2;
233   with (object) {
237   Object.setPrototypeOf(object, proto);
239   with (object) {
246   assertEquals(2, object.x);
251 function TestNonObject(object) {  argument
254   object.x = 3;
255   object.y = 4;
257   object[Symbol.unscopables] = 'xy';
258   with (object) {
263   object[Symbol.unscopables] = null;
264   with (object) {
272 function TestChangeDuringWith(object) {  argument
275   object.x = 3;
276   object.y = 4;
278   with (object) {
281     object[Symbol.unscopables] = {x: true};  variable in TestChangeDuringWith
289 function TestChangeDuringWithWithPossibleOptimization(object) {  argument
291   object.x = 2;
292   with (object) {
294       if (i === 500) object[Symbol.unscopables] = {x: true};
302 function TestChangeDuringWithWithPossibleOptimization2(object) {  argument
304   object.x = 2;
305   object[Symbol.unscopables] = {x: true};  variable in TestChangeDuringWithWithPossibleOptimization2
306   with (object) {
308       if (i === 500) delete object[Symbol.unscopables];
316 function TestChangeDuringWithWithPossibleOptimization3(object) {  argument
318   object.x = 2;
319   object[Symbol.unscopables] = {};
320   with (object) {
322       if (i === 500) object[Symbol.unscopables].x = true;
330 function TestChangeDuringWithWithPossibleOptimization4(object) {  argument
332   object.x = 2;
333   object[Symbol.unscopables] = {x: true};  variable in TestChangeDuringWithWithPossibleOptimization4
334   with (object) {
336       if (i === 500) delete object[Symbol.unscopables].x;
344 function TestAccessorReceiver(object, proto) {  argument
349       assertEquals(object, this);
356   Object.setPrototypeOf(object, proto);
359   with (object) {
366 function TestUnscopablesGetter(object) {  argument
370   if (object === global) return;
373   object.x = 'object';
376   Object.defineProperty(object, Symbol.unscopables, {
383   with (object) {
390   Object.defineProperty(object, Symbol.unscopables, {
397   with (object) {
404   Object.defineProperty(object, Symbol.unscopables, {
411   with (object) {
416   assertEquals(1, object.x);
418   with (object) {
423   assertEquals(1, object.x);
438     objects.forEach(function(object) {  argument
441           assertEquals(object, this);
447       object.__proto__ = proto;
448       Object.defineProperty(object, 'x', {
450           assertEquals(object, this);
456       with (object) {
460       object[Symbol.unscopables] = {x: true};  variable
461       with (object) {
466       delete object[Symbol.unscopables];
476 function TestSetterOnBlacklisted(object, proto) {  argument
487   Object.setPrototypeOf(object, proto);
488   Object.defineProperty(object, 'x', {
497   object.x_ = 1;
499   with (object) {
504   assertEquals(2, object.x);
506   object[Symbol.unscopables] = {x: true};  variable in TestSetterOnBlacklisted
508   with (object) {
513   assertEquals(2, object.x);
518 function TestObjectsAsUnscopables(object, unscopables) {  argument
520   object.x = 2;
522   with (object) {
524     object[Symbol.unscopables] = unscopables;
531 function TestAccessorOnUnscopables(object) {  argument
533   object.x = 2;
541   with (object) {
543     object[Symbol.unscopables] = unscopables;
550 function TestLengthUnscopables(object, proto) {  argument
552   with (object) {
554     object[Symbol.unscopables] = {length: true};  variable in TestLengthUnscopables
556     delete object[Symbol.unscopables];
565 function TestFunctionNameUnscopables(object) {  argument
567   with (object) {
569     object[Symbol.unscopables] = {name: true};  variable in TestFunctionNameUnscopables
571     delete object[Symbol.unscopables];
644   var object = {  variable in TestGetUnscopablesGetterThrows
650   Object.defineProperty(object, Symbol.unscopables, {
656     with (object) {