What the fuck is this language even?

gistfile1.txt

#!/usr/bin/env node

let success = 'success';
let failure = 'failure';

async function runEngine() {
  console.log('runEngine');
  var report = await run1();
  return report; // Important! Otherwise it will return some bizarre object
  // { '0': {},
  //   '1':
  //   { [Function: require]
  //     resolve: [Function: resolve],
  //     main:
  //     Module {
  //       id: '.',
  //       exports: {},
  //       parent: null,
  //       filename: '/Users/htmldrum/code/javascript/engine.js',
  //       loaded: true,
  //       children: [],
  //       paths: [Array] },
  //     extensions: { '.js': [Function], '.json': [Function], '.node': [Function] },
  //     cache: { '/Users/htmldrum/code/javascript/engine.js': [Object] } },
  //   '2':
  //   Module {
  //     id: '.',
  //     exports: {},
  //     parent: null,
  //     filename: '/Users/htmldrum/code/javascript/engine.js',
  //     loaded: true,
  //     children: [],
  //     paths:
  //     [ '/Users/htmldrum/code/javascript/node_modules',
  //       '/Users/htmldrum/code/node_modules',
  //       '/Users/htmldrum/node_modules',
  //       '/Users/node_modules',
  //       '/node_modules' ] },
  //   '3': '/Users/htmldrum/code/javascript/engine.js',
  //   '4': '/Users/htmldrum/code/javascript' }
};

function run1() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("run1: resolved");
      resolve(success);
      // callcbSucc(resolve);
    }, 500);
  });
}

function run2() {
  console.log("run2");
  return new Promise((resolve, reject) => {
  });
}

function run3() {
  console.log("run3");
  return new Promise((resolve, reject) => {
  });
}

function run4() {
  console.log("run4");
  return new Promise((resolve, reject) => {
  });
}

function callcbSucc(fn) {
  fn('titties');
}

function callcbFail(fn) {
  fn(failure);
}

runEngine()
  .then(x => {
    console.log("Arguments: ", arguments);
    console.log("Resolved with: ", x);
  }).catch(reason => {
    console.log("Failed with reason: ", arguments);
  });