Send empty commands if tab completion is disabled

paper-server/patches/sources/net/minecraft/commands/Commands.java.patch

@@ -190,12 +190,17 @@
              }
          } else {
              callback.accept(executioncontext);
-@@ -377,22 +453,84 @@
+@@ -377,22 +453,89 @@
      }
  
      public void sendCommands(ServerPlayer player) {
 -        Map<CommandNode<CommandSourceStack>, CommandNode<SharedSuggestionProvider>> map = Maps.newHashMap();
-+        if ( org.spigotmc.SpigotConfig.tabComplete < 0 ) return; // Spigot
++        // Paper start - Send empty commands if tab completion is disabled
++        if (org.spigotmc.SpigotConfig.tabComplete < 0) {
++            player.connection.send(new ClientboundCommandsPacket(new RootCommandNode<>()));
++            return;
++        }
++        // Paper end - Send empty commands if tab completion is disabled
 +        // CraftBukkit start
 +        // Register Vanilla commands into builtRoot as before
 +        // Paper start - Perf: Async command map building
@@ -280,7 +285,7 @@
  
                  argumentbuilder.requires((icompletionprovider) -> {
                      return true;
-@@ -415,12 +553,12 @@
+@@ -415,12 +558,12 @@
                      argumentbuilder.redirect((CommandNode) resultNodes.get(argumentbuilder.getRedirect()));
                  }
  
@@ -295,7 +300,7 @@
                  }
              }
          }
-@@ -481,7 +619,7 @@
+@@ -481,7 +624,7 @@
              }
  
              private <T> HolderLookup.RegistryLookup.Delegate<T> createLookup(final HolderLookup.RegistryLookup<T> original) {