Dangerous exception swallowing by promises

promises-swallow.js

'use strict';

try {
  new Promise((resolve) => {
    resolve('test');
  }).then(function () {
    throw new Error('test');
  });
} catch (e) {
  console.log('Will not show');
  console.error(e);
}

process.on('unhandledExceptions', function (err) {
  console.log('Unhandled exception (will not show either):');
  console.error(err);
});

process.on('unhandledRejection', function (err) {
  console.log('Unhandled rejection:');
  console.error(err);
});