Emit listener error only if there is a handler

[bainian12345]

Description

This checklist is used to make sure that common guidelines for a pull request are followed.

• [x] I have read the contribution guidelines.
• [x] Title of the pull request is clear and informative.
• [x] There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR.
• [x] The pull request does not introduce breaking changes (unless a major version change occurs in the assembly and module).
• [x] If applicable, the public code is properly documented.
• [x] The code builds without any errors.

[dlstucki]

Ah, 'error' is different/special. https://nodejs.org/api/events.html#events_error_events

---

In reply to: 592386475 [](ancestors = 592386475)