Fix in 5.38.0 breaks async iterators

[gyzerok]

Describe the bug

In 5.38.0 return of async iterator stops being called when breaking out of the loop. The REPL is based on a real code we have in production that got broken with the update. Mostly likely its #16521.

Reproduction

REPL

Observe logs in both 5.38.0 and 5.37.3. Newer version is missing return log.

Expected sequence should be number -> number -> number -> return -> ended.

Logs

System Info

irrelevant

Severity

blocking an upgrade

[Ocean-OS]

Oops, sorry about that 😅
Will look into writing a fix by the end of today.

[gyzerok]

Oh, text about production wasn't to point fingers, just to avoid questions "why do you need something like that" :) Thank you!

[Rich-Harris]

@gyzerok I want you to know that you are famous among the maintainers for consistently finding the most interesting bugs. I don't know how you do it but 'oh no, we broke @gyzerok's app again' is a borderline meme at this point. Keep 'em coming!

[gyzerok]

Haha, just wait until we enable async in the project 😆

On the serious note - love how responsive and helpful the team is with the issues, not really common for open-source project of that scale. It feels like it's really worth it to hunt for repros, cause they won't end up as forever-open issues. Appreciate it!