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