Emit a warning if process exits with unsettled modules?

[targos]

Here's a simple ES module with top-level await:

console.log('before');

await new Promise(() => {});

console.log('after');

Executing it only prints before and then exits with code 13.

I don't know where the exit code is set, but it seems that we actually detect that the promise representing the module's execution never settles.
Could we emit/print a warning when it happens? Ideally it could contain the path to the problematic module.

[RaisinTen]

I'm pretty sure this is where the exit code is set:

node/lib/internal/modules/run_main.js

Line 59 in 822f9ff

process.exitCode = 13;

and it was introduced in #34640

[nickserv]

I was confused to notice a failing command when I switched shells, even though my Node program wasn't printing any errors. I had to do a few minutes of searching to understand what was going on. An error explaining how this can be fixed would be helpful.