Is this repository monitored at all? Any feedback?

It's monitored, but we don't automatically merge PRs for 2.5 if something is applied to 3.x.
You need a tracker and likely also some tests here as well.

Try to give details and don't expect people to follow a link to a commit elsewhere.

On a sidenote: Joomla 2.5 will reach end of life by the end of this year. So the interest in it is probably already declining a bit.

From the commit above:

Make JEventDispatcher compatible with HHVM
According to HHVM inconsistencies guildline, "Under Zend PHP, foreach by value will modify the array's internal cursor under certain circumstances. Under HipHop VM, foreach by value will never modify the array's internal cursor.

Moving end() from above key() function to below it also make the code easier to understand as the behavior of foreach with array cursor is complicated to understand.

I am not involved enough in Joomla development to write tests for this. @mbabker merged it in 3.x here: http://issues.joomla.org/tracker/joomla-cms/3199

I was not referring to unit tests, usually we need human testers to see if nothing breaks.
Lets see if Michael wants to merge this as well based on code review :)

Must have missed seeing this PR honestly with everything I've had going on over the last few weeks. I'll merge it.

No hard feelings, thank you for the quick response after the bump!

Understand this is a backport. But still wondering by curiosity why end() is not also called when returning inside a foreach loop ?