Handler.close() exits parent process

[claabs]

Following up on some discussion in the Discord server.

Calling handler.close() after creating an Agent will exit the process without any errors thrown.

Here's a simple reproduction that demonstrates the issue (running local core):

async function main(): Promise<void> {
  const handler = new Handler();
  const agent = await handler.createAgent();
  await agent.close();
  await handler.close();
  console.log('This should log');
}

main()
  .then(() => console.log('finished'))
  .catch((err) => console.error(err));

This should log does not get logged

This also occurs with dispatchAgent:

async function main2(): Promise<void> {
  const handler = new Handler();
  handler.dispatchAgent(async (agent) => {
    await agent.goto('https://example.com');
  });
  await handler.waitForAllDispatches();
  await handler.close();
  console.log('This should log');
}

main2()
  .then(() => console.log('finished'))
  .catch((err) => console.error(err));

Removing await handler.close() just causes the process to complete, but hang and not exit.