What about CallExpression?

@azz I'm not sure what you meant.. what about CallExpression?

As in the same without new. It actually already behaves as expected, but I'm not sure why.

function functionName() {
  // indent to make the line break
  if (true) {
    this._aVeryLongVariableNameToForrrrrrrBreak = this.Promise(
      (resolve, reject) => {
        // do something
      }
    );
  }
}

Ah, understood now! That's because that case doesn't get here, actually. That's printed by printMemberChain, as you can see here:

Ah, of course!