WORLDEDIT-2543 - Reported by GrKr

I'm running a Minecraft Bukkit server with craftbukkit 1.4.6-R0.1 and WorldEdit 5.4.5.
If I type //set command, the console shows this error:

10:23:18 [INFO] GrKr issued server command: //set 1
10:23:18 [SEVERE] java.lang.NoClassDefFoundError: net/minecraft/server/Block
10:23:18 [SEVERE] at com.sk89q.worldedit.bukkit.BukkitWorld.isValidBlockType
(BukkitWorld.java:872)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit.getBlock(WorldEdit.java:3
90)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit.getBlock(WorldEdit.java:3
31)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit.getBlock(WorldEdit.java:5
25)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit.getBlockPattern(WorldEdit
.java:584)
10:23:18 [SEVERE] at com.sk89q.worldedit.commands.RegionCommands.set(RegionC
ommands.java:74)
10:23:18 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Met
hod)
10:23:18 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMetho
dAccessorImpl.java:57)
10:23:18 [SEVERE] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Delegat
ingMethodAccessorImpl.java:43)
10:23:18 [SEVERE] at java.lang.reflect.Method.invoke(Method.java:601)
10:23:18 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.invok
eMethod(CommandsManager.java:522)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.
java:230)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.
java:161)
10:23:18 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.execu
teMethod(CommandsManager.java:509)
10:23:18 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.execu
te(CommandsManager.java:425)
10:23:18 [SEVERE] at com.sk89q.worldedit.WorldEdit.handleCommand(WorldEdit.j
ava:1315)
10:23:18 [SEVERE] at com.sk89q.worldedit.bukkit.WorldEditPlugin.onCommand(Wo
rldEditPlugin.java:197)
10:23:18 [SEVERE] at com.sk89q.bukkit.util.DynamicPluginCommand.execute(Dyna
micPluginCommand.java:52)
10:23:18 [SEVERE] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleComm
andMap.java:186)
10:23:18 [SEVERE] at org.bukkit.craftbukkit.v1_4_6.CraftServer.dispatchComma
nd(CraftServer.java:510)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.PlayerConnection.handleComm
and(PlayerConnection.java:980)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.PlayerConnection.chat(Playe
rConnection.java:898)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.PlayerConnection.a(PlayerCo
nnection.java:853)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.Packet3Chat.handle(Packet3C
hat.java:44)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.NetworkManager.b(NetworkMan
ager.java:290)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.PlayerConnection.d(PlayerCo
nnection.java:112)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.ServerConnection.b(SourceFi
le:39)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServerConnection.b
(SourceFile:30)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.r(Minecraft
Server.java:598)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServer.r(Dedicated
Server.java:224)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.q(Minecraft
Server.java:494)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.MinecraftServer.run(Minecra
ftServer.java:427)
10:23:18 [SEVERE] at net.minecraft.server.v1_4_6.ThreadServerApplication.run
(SourceFile:849)

Comment by _Sped

1. You are running a 1.4.5 version. You need to get 5.4.6.
2. 5.4.6 is broken and you need the fix.
3. http://build.sk89q.com/job/WorldEdit/