Null pointer dereference in ValueType::FromObject() when jitting

```
function foo(){
try{
x = arguments;
throw Error();
} catch(e){
return x.length;
}
var x = {};
}

for(var v0 = 0; v0 < 0x1000; v0++){
foo();
}
```

It is related to #6058 .

ChakraCore Version: ch version 1.11.15.0 (1B6EE856A9F07071BB8D11ED9068CF262DF8285FC9E762E9F77FBB6A3957E365)
Environment: 18.04.2-Ubuntu