Shut down after hard crash fails at savePlayers

[spring-dependency-management]

Expected behavior

the error shouldn't halt execution for the whole server jar, worlds should attempt to save

Observed/Actual behavior

The whole server halts execution indefinitely as the shutdown process fails, an interrupted shut down process means server is down forever until process is manually killed.

[17:29:57] [Paper Watchdog Thread/INFO]: [ProtocolLib] Disabling ProtocolLib v5.4.0-SNAPSHOT-739
[17:29:57] [Paper Watchdog Thread/INFO]: Saving players
[17:29:57] [Paper Watchdog Thread/WARN]: Asynchronous Save Players! Blocking thread until it returns 
java.lang.IllegalStateException: null
	at io.papermc.paper.util.MCUtil.ensureMain(MCUtil.java:116) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at net.minecraft.server.players.PlayerList.saveAll(PlayerList.java:1073) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at net.minecraft.server.players.PlayerList.saveAll(PlayerList.java:1069) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1016) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:755) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at net.minecraft.server.MinecraftServer.close(MinecraftServer.java:974) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
	at org.spigotmc.WatchdogThread.run(WatchdogThread.java:146) ~[paper-1.21.4.jar:1.21.4-DEV-5a34bf0]
... Server dead forever

Steps/models to reproduce

Hard crash a server using thread.sleep(999999), it should at-least attempt to save the world to prevent corruption, some recent patch has broken this behaviour though.

Plugin and Datapack List

N/A

Paper version

This server is running Paper version 1.21.4-DEV-main@5a34bf0 (1970-01-01T00:00:00Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.4-DEV-88bbead (MC: 1.21.4)

Other

No response

[Spottedleaf]

Resolved in a392d47