Starting with 20w14a, if the world folder is a symbolic link to the actual world, the server crashes:

[11:23:07] [main/FATAL]: Failed to start the minecraft server

java.nio.file.FileAlreadyExistsException: ./world

at sun.nio.fs.UnixException.translateToIOException(UnixException.java:94) ~[?:?]

at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) ~[?:?]

at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116) ~[?:?]

at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:389) ~[?:?]

at java.nio.file.Files.createDirectory(Files.java:689) ~[?:?]

at java.nio.file.Files.createAndCheckIsDirectory(Files.java:796) ~[?:?]

at java.nio.file.Files.createDirectories(Files.java:742) ~[?:?]

at acr.a(SourceFile:21) ~[minecraft_server.20w14a.jar:?]

at cxp$a.<init>(SourceFile:196) ~[minecraft_server.20w14a.jar:?]

at cxp.c(SourceFile:185) ~[minecraft_server.20w14a.jar:?]

at net.minecraft.server.MinecraftServer.main(SourceFile:940) [minecraft_server.20w14a.jar:?]