WORLDEDIT-2897 - Reported by Steven.Mackiol

Exception:
20:42:03 [INFO] WorldEdit: IonTrust (in "ctw"): /set 90%,0 - Region: (721.0, 70.0, -28.0) - (72
9.0, 109.0, -21.0)
20:42:03 [SEVERE] java.lang.ArrayIndexOutOfBoundsException: 1
20:42:03 [SEVERE] at com.sk89q.worldedit.WorldEdit.getBlockPattern(WorldEdit.java:679)
20:42:03 [SEVERE] at com.sk89q.worldedit.commands.RegionCommands.set(RegionCommands.java:74)
20:42:03 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
20:42:03 [SEVERE] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
20:42:03 [SEVERE] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
20:42:03 [SEVERE] at java.lang.reflect.Method.invoke(Unknown Source)
20:42:03 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.invokeMethod(CommandsManager.java:533)
20:42:03 [SEVERE] at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:257)
20:42:03 [SEVERE] at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:188)
20:42:03 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:520)
20:42:03 [SEVERE] at com.sk89q.minecraft.util.commands.CommandsManager.execute(CommandsManager.java:425)
20:42:03 [SEVERE] at com.sk89q.worldedit.WorldEdit.handleCommand(WorldEdit.java:1396)
20:42:03 [SEVERE] at com.sk89q.worldedit.bukkit.WorldEditPlugin.onCommand(WorldEditPlugin.java:242)
20:42:03 [SEVERE] at com.sk89q.bukkit.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:52)
20:42:03 [SEVERE] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
20:42:03 [SEVERE] at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:527)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.PlayerConnection.handleCommand(PlayerConnection.java:979)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.PlayerConnection.chat(PlayerConnection.java:890)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java:837)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.Packet3Chat.handle(SourceFile:49)
20:42:03 [SEVERE] at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:230)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java:116)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
20:42:03 [SEVERE] at org.spigotmc.netty.NettyServerConnection.b(NettyServerConnection.java:125)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:592)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:239)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:481)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:413)
20:42:03 [SEVERE] at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)