[MC-230525] Dedicated server failing to bind to port causes NullPointerException

The bug

When the dedicated server fails to bind to the specified port, e.g. because another application is already using that port, a NullPointerException occurs:

1.17.1-pre1

[15:59:42] [Server thread/WARN]: **** FAILED TO BIND TO PORT!
[15:59:42] [Server thread/WARN]: The exception was: java.net.BindException: Address already in use: bind
[15:59:42] [Server thread/WARN]: Perhaps a server is already running on that port?
[15:59:42] [Server thread/INFO]: Stopping server
[15:59:42] [Server thread/INFO]: Saving worlds
[15:59:42] [Server thread/ERROR]: Exception stopping the server
java.lang.NullPointerException: Cannot invoke "abr.o_()" because "Γÿâ" is null
        at net.minecraft.server.MinecraftServer.a(SourceFile:592) ~[1.17.1-pre1.jar:?]
        at net.minecraft.server.MinecraftServer.u(SourceFile:619) ~[1.17.1-pre1.jar:?]
        at aas.u(SourceFile:585) ~[1.17.1-pre1.jar:?]
        at net.minecraft.server.MinecraftServer.x(SourceFile:729) ~[1.17.1-pre1.jar:?]
        at net.minecraft.server.MinecraftServer.a(SourceFile:274) ~[1.17.1-pre1.jar:?]
        at java.lang.Thread.run(Thread.java:831) [?:?]

Expected would be that the server cleanly exits without any exception.

Reproduction steps

Download the dedicated server from https://www.minecraft.net/en-us/download/server
Start the server twice on the same port (you might have to start them in separate folders)
The second server shows a NullPointerException in the log