See https://twitter.com/fasterthanlime/status/858674514586218496

nodejs-async-stacktraces-bug.js

async function main () {
  const noop = async () => null;
  const cherrypie = async () => {
    // throwing here is fine...
    // the next line loses stack trace info. comment it out to see it working
    await noop();
    // throwing here is useless
    throw new Error("in c");
  }
  const binomial = async () => await cherrypie();
  const abacus = async () => await binomial();
  await checkStack(abacus());
}

async function checkStack(promise) {
  let threw = false;
  try {
    await promise;
  } catch (e) {
    threw = true;
    let seen = { a: false, b: false, c: false };
    for (const line of e.stack.split("\n")) {
      if (/at abacus /.test(line)) {
        seen.a = true;
      }
      if (/at binomial /.test(line)) {
        seen.b = true;
      }
      if (/at cherrypie /.test(line)) {
        seen.c = true;
      }
    }

    if (!seen.a || !seen.b || !seen.c) {
      // tslint:disable-next-line
      console.log(`No trace of a/b/c in stack!`);
      console.log(`Offensive stack trace:\n${e.stack}`);
      process.exit(1);
    } else {
      console.log(`Seen a, b, and c!`);
      console.log(`Proper stack trace:\n${e.stack}`);
    }
  }

  if (!threw) {
    throw new Error(`should reject`);
  }
}

main();