Mainloop terminating unintentionally

[ZwodahS]

This issue is from Heaps originally, and as requested, is moved here.

Original issues HeapsIO/heaps#1068

---- copied from heaps issue
minimum code https://github.com/ZwodahS/heaps-sound-bug

OS : Mac
heaps version: 57c1bd34779193636562621faca5a875b2113923
haxe: 4.2.4

SoundManager set isBlocking to false.
https://github.com/HeapsIO/heaps/blob/master/hxd/snd/Manager.hx#L151

Main loop cancel the event and only adds it back when there is a blocking event.
https://github.com/HaxeFoundation/haxe/blob/development/std/haxe/MainLoop.hx#L81-L89
https://github.com/HaxeFoundation/haxe/blob/development/std/haxe/MainLoop.hx#L124

This is fine when live update is set to true hxd.res.Resource.LIVE_UPDATE = true; (suspect that the live update created a blocking main event) or when you have mainEvent elsewhere.

with that, there is 2 solutions that I found that works
https://github.com/ZwodahS/heaps-sound-bug/blob/main/App.hx#L4-L5

However, I am curious as to what is the best way to handle this, and if this is considered a bug.

[ncannasse]

I think in Browser JS, MainLoop should never reall "exit" because you might have some other source of events (like in our case).

[ncannasse]

Ping @RealyUniqueName : this used to work before MainLoop changes in ~4.2

[Simn]

The change causes some threads tests to fail:

cases.TestMainLoop
  testNewAction_immediately: ERROR O
    missed async calls: 1
  testWorksInStaticInits_issue10114: ERROR O
    missed async calls: 1

[Simn]

@RealyUniqueName @ncannasse I would appreciate if you could sort out this failing test because I'm not familiar with this code at all. This currently makes our CI red.