Why is the property of the inherited class undefined inside the implementation of the abstract method?

Question

typescript

There is a code. Why does this point to the class in which it is called, and this.name to the parent class? How to fix?

abstract class Abstract {
  protected name: string;
  
  constructor () {
    this.abstractMethod();
  }
  
  protected abstract abstractMethod (): void;
}

class Concrete extends Abstract {
  protected name: string = 'Concrete';
  
  protected abstractMethod () {
    console.log(this, this.name); // Concrete, undefined
  }
}

new Concrete();

Link to example

Answer 1

I did it differently in the code, but it's still a bug:
https://github.com/Microsoft/TypeScript/issues/7724