| undefined undefined 0 | |
| ReferenceError: "x" is not defined | |
| z: 1 | |
| assignment to z succeeded | |
| ReferenceError: "z" is not defined | |
| 1 | |
| assignment to a succeeded | |
| a: 1 | |
| b: 1 | |
| assignment to b succeeded | |
| b: 1 | |
| TypeError: "c" is not a writable property of [object Object] | |
| c: 0 | |
| 2 1 0 | |
| 2 1 0 undefined | |
| undefined undefined undefined undefined undefined | |
| v: 1 | |
| v: 2 | |
| this.v: undefined | |
| v: 2 |