Memory leak during actor creation.

[devas123]

When creating a new actor in the following code:

zio-actors/actors/src/main/scala/zio/actors/ActorSystem.scala

Lines 132 to 143 in 1560ff2

	map <- refActorMap.get
	finalName <- buildFinalName(parentActor.getOrElse(""), actorName)
	_ <- if (map.contains(finalName)) IO.fail(new Exception(s"Actor $finalName already exists")) else IO.unit
	path = buildPath(actorSystemName, finalName, remoteConfig)
	derivedSystem = new ActorSystem(actorSystemName, config, remoteConfig, refActorMap, Some(finalName))
	childrenSet <- Ref.make(Set.empty[ActorRef[Any]])
	actor <- stateful.makeActor(
	sup,
	new Context(path, derivedSystem, childrenSet),
	() => dropFromActorMap(path, childrenSet)
	)(init)
	_ <- refActorMap.set(map + (finalName -> actor))

If the actor stops and calls dropFromActorMap before it gets added to the actor map at line 143, the map will be updated with a reference to a dead actor, which creates a memory leak.

[devas123]

A quick solution could be to pass a Promise to the dropFromActorMap, which will be resolved after the map has been updated.