Ember Conccurency - Error Handling

controllers.application.js

import Ember from 'ember';
import { task } from 'ember-concurrency';

function fetchReject(type) {
  return new Promise(function(resolve, reject) {
    Ember.run.later(() => reject('rejected reason'), 1000);
  });
}

export default Ember.Controller.extend({
  appName: 'Ember Conccurency - Error Handling',
 
  actions: {
    myTask() {
      this.get('myTask')
        .perform()
        .then(() => console.log('success: task is a success'))
        .catch(e => console.log('catch 2:', e));
    },
    
    myBuggyTask() {
      this.get('myBuggyTask')
        .perform()
        .then(() => console.log('success: task is a success'))
        .catch(e => console.log('catch 2:', e));
    },
  },
  
  myTask: task(function*() {
    try {
      const response = yield fetchReject();
      console.log(response);
    } catch (e) {
      console.log('catch 1:', e);
      
      // You must do one of these if you want the error to get
      // "piped" through the promise chain in the action.
      //
      // yield Promise.reject(e);
      // return Promise.reject(e);
      throw e;
    }
  }).drop(),
  
  myBuggyTask: task(function*() {
    try {
      const response = yield fetchReject();
    } catch (e) {
      console.log('catch 1:', e);
    }
  }).drop(),
});

templates.application.hbs

<h1>{{appName}}</h1>
<hr>

<p>
  <button {{action "myTask"}}>Submit my task</button>
</p>

<p>
  <button {{action "myBuggyTask"}}>Submit my buggy task</button>
</p>

<p>Click the buttons and check your console.</p>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-concurrency": "0.8.19"
  }
}