1undefined undefined 0
2ReferenceError: "x" is not defined
3z: 1
4assignment to z succeeded
5ReferenceError: "z" is not defined
61
7assignment to a succeeded
8a: 1
9b: 1
10assignment to b succeeded
11b: 1
12TypeError: "c" is not a writable property of [object Object]
13c: 0
142 1 0
152 1 0 undefined
16undefined undefined undefined undefined undefined
17v: 1
18v: 2
19this.v: undefined
20v: 2
21