Nested worker threads fail to produce meaningful error messages

[micon4sure]

• Version: v12.16.1
• Platform: linux x64
• Subsystem:

What steps will reproduce the bug?

Create a project with nested worker threads and throw an error in the nested thread.

( https://github.com/teh-mICON/ts_worker_error has this setup, ignore .ts files. )

How often does it reproduce? Is there a required condition?

Always.

What is the expected behavior?

Show proper error message

What do you see instead?

Error [ERR_UNHANDLED_ERROR]: Unhandled error. ({})

Additional information