WORLDEDIT-2386 - Reported by Gandaflux

Bukkit 2518
WorldEdit 5.4.6-snapshot (1306-3f1a2bf)

19:39:53 [WARNING] WorldEdit: Failed to do NMS access for direct NBT data copy
java.lang.NoClassDefFoundError: net/minecraft/server/NBTBase
at com.sk89q.worldedit.bukkit.BukkitWorld.getBlock(BukkitWorld.java:989)
at com.sk89q.worldedit.EditSession.rawGetBlock(EditSession.java:403)
at com.sk89q.worldedit.EditSession.getBlock(EditSession.java:357)
at com.sk89q.worldedit.CuboidClipboard.copy(CuboidClipboard.java:266)
at com.sk89q.worldedit.commands.ClipboardCommands.copy(ClipboardCommands.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sk89q.minecraft.util.commands.CommandsManager.invokeMethod(CommandsManager.java:522)
at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:240)
at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:171)
at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:509)
at com.sk89q.minecraft.util.commands.CommandsManager.execute(CommandsManager.java:425)
at com.sk89q.worldedit.WorldEdit.handleCommand(WorldEdit.java:1338)
at com.sk89q.worldedit.bukkit.WorldEditPlugin.onCommand(WorldEditPlugin.java:197)
at com.sk89q.bukkit.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:52)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
at org.bukkit.craftbukkit.v1_4_5.CraftServer.dispatchCommand(CraftServer.java:536)
at net.minecraft.server.v1_4_5.NetServerHandler.handleCommand(NetServerHandler.java:999)
at net.minecraft.server.v1_4_5.NetServerHandler.chat(NetServerHandler.java:917)
at net.minecraft.server.v1_4_5.NetServerHandler.a(NetServerHandler.java:861)
at net.minecraft.server.v1_4_5.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.v1_4_5.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_5.NetServerHandler.d(NetServerHandler.java:113)
at net.minecraft.server.v1_4_5.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_5.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_5.MinecraftServer.r(MinecraftServer.java:582)
at net.minecraft.server.v1_4_5.DedicatedServer.r(DedicatedServer.java:222)
at net.minecraft.server.v1_4_5.MinecraftServer.q(MinecraftServer.java:478)
at net.minecraft.server.v1_4_5.MinecraftServer.run(MinecraftServer.java:413)
at net.minecraft.server.v1_4_5.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.NBTBase
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:34)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 32 more