How to prevent throw errors inside the then sections of the Promise Q library?

Question

Angular

I'm using the Q promise library in Angular 1.
I have this code:

$q((resolve, reject) => {
  resolve(1);
}).then(function(ret) {
  throw new Error("o_O");
}).catch(function(err) {
  console.log(err);
});

An error is displayed in the console throw new Error("o_O");
And then this error is re-displayed console.log(err);

I want the error to be displayed only in the catch section.
How to prevent throw errors inside then sections?
Code example:
plnkr.co/edit/MiH48Qb7tfCEW31mz1ou?p=preview
To reproduce the problem, you must first open the browser console, then run the example and you will see in the console what is first output by throw, and then by console.log).

Answer 1

Looks like I found a way around this problem. Instead of throw, you can use $q.reject. Then at least their own exceptions will not be duplicated.

$q((resolve, reject) => {
    resolve(1);
}).then(function(ret) {
    //throw new Error("o_O");
    return $q.reject(new Error("o_O"));
}).catch(function(err) {
    console.log(err);
});