--- a/net/minecraft/server/CommandExecute.java
+++ b/net/minecraft/server/CommandExecute.java
@@ -4,6 +4,10 @@
 import java.util.Collections;
 import java.util.List;
 import javax.annotation.Nullable;
+// CraftBukkit start
+import org.bukkit.craftbukkit.command.ProxiedNativeCommandSender;
+import org.bukkit.craftbukkit.command.VanillaCommandWrapper;
+// CraftBukkit end
 
 public class CommandExecute extends CommandAbstract {
 
@@ -59,26 +63,41 @@
             }
 
             String s = a(astring, b0);
-            CommandListenerWrapper commandlistenerwrapper = CommandListenerWrapper.a(icommandlistener).a(entity, new Vec3D(d0, d1, d2)).a(minecraftserver.worldServer[0].getGameRules().getBoolean("commandBlockOutput"));
+            CommandListenerWrapper commandlistenerwrapper = CommandListenerWrapper.a(icommandlistener).a(entity, new Vec3D(d0, d1, d2)).a(minecraftserver.worlds.get(0).getGameRules().getBoolean("commandBlockOutput")); // CraftBukkit
             ICommandHandler icommandhandler = minecraftserver.getCommandHandler();
 
             try {
-                int i = icommandhandler.a(commandlistenerwrapper, s);
+                // CraftBukkit start
+                org.bukkit.command.CommandSender sender = CommandBlockListenerAbstract.unwrapSender(icommandlistener);
+                int i = CommandBlockListenerAbstract.executeCommand(commandlistenerwrapper, new ProxiedNativeCommandSender(commandlistenerwrapper, sender, entity.getBukkitEntity()), s); 
+                // CraftBukkit end
 
                 if (i < 1) {
                     throw new CommandException("commands.execute.allInvocationsFailed", new Object[] { s});
                 }
             } catch (Throwable throwable) {
+                // CraftBukkit start
+                if (throwable instanceof CommandException) {
+                    throw (CommandException) throwable;
+                }
+                // CraftBukkit end
                 throw new CommandException("commands.execute.failed", new Object[] { s, entity.getName()});
             }
         }
     }
 
     public List<String> tabComplete(MinecraftServer minecraftserver, ICommandListener icommandlistener, String[] astring, @Nullable BlockPosition blockposition) {
-        return astring.length == 1 ? a(astring, minecraftserver.getPlayers()) : (astring.length > 1 && astring.length <= 4 ? a(astring, 1, blockposition) : (astring.length > 5 && astring.length <= 8 && "detect".equals(astring[4]) ? a(astring, 5, blockposition) : (astring.length == 9 && "detect".equals(astring[4]) ? a(astring, (Collection) Block.REGISTRY.keySet()) : Collections.emptyList())));
+        return astring.length == 1 ? a(astring, minecraftserver.getPlayers()) : (astring.length > 1 && astring.length <= 4 ? a(astring, 1, blockposition) : (astring.length > 5 && astring.length <= 8 && "detect".equals(astring[4]) ? a(astring, 5, blockposition) : (astring.length == 9 && "detect".equals(astring[4]) ? a(astring, (Collection) Block.REGISTRY.keySet()) : Collections.<String>emptyList()))); // CraftBukkit - decompile error
     }
 
     public boolean isListStart(String[] astring, int i) {
         return i == 0;
     }
+
+    // CraftBukkit start - fix decompiler error
+    @Override
+    public int compareTo(ICommand o) {
+        return a((ICommand) o);
+    }
+    // CraftBukkit end
 }