Not handling "this" correctly

[joydeep-b]

This should run with no errors:

function Duck() {
  this.x = 1;
}

class DuckClass {
  constructor() {
    this.x = 1;
  }
}

let duck1 = new Duck();
let duck2 = new DuckClass();

However, it produces:

object does not have member 'x' at Line 4: in Duck
... : in handleNew
... 

[joydeep-b]

Duplicate of #81 , duplicated during the great github outage of 2018.