Array.isArray(x): true
x.foo: 3
x[1]: 4
x[11]: 3
x[1]: 7
x[11]: 6
Object.getOwnPropertyDescriptor(simpleArrayEmptyLength.length): {"value":0,"writable":true,"enumerable":false,"configurable":false}
aFixedInfo: [0,1,2,3,4,5]
aFixedInfo: [0,-1,2,3,4,5]
Object.getOwnPropertyDescriptor(aFrozen.length): {"value":6,"writable":false,"enumerable":false,"configurable":false}
isFrozen: false
isFrozen: true