excetion_in_coroutine.js

var Promise = require('bluebird');

// log the error
Promise.onPossiblyUnhandledRejection(function(error){
  // this will be called even though there is a catch
  console.log('uncaught error here', error);
});

var toCall = Promise.coroutine(function* () {
  console.log('going to explode');
  throw new Error('boom');
});

Promise.spawn(function* () {
  console.log('calling the function here');
  var val = yield toCall();
})
.catch(function (error) {
  console.log('got an error', error);
});