node/test/parallel/test-worker-exit-from-uncaught-exception.js

'use strict';
const common = require('../common');
const assert = require('assert');
const { Worker } = require('worker_threads');

// Check that `process.exit()` can be called inside a Worker from an uncaught
// exception handler.

// Do not use isMainThread so that this test itself can be run inside a Worker.
if (!process.env.HAS_STARTED_WORKER) {
  process.env.HAS_STARTED_WORKER = 1;
  const w = new Worker(__filename);
  w.on('exit', common.mustCall((code) => {
    assert.strictEqual(code, 42);
  }));
  return;
}

process.on('uncaughtException', () => {
  process.exit(42);
});

throw new Error();