From 1e5e5842a6931bb5e35c926906900edd0fc19e91 Mon Sep 17 00:00:00 2001
From: riking <rikingcoding@gmail.com>
Date: Wed, 14 May 2014 13:46:48 -0700
Subject: [PATCH] Process conversation input on the main thread. Fixes
 BUKKIT-5611


diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index ef9e2dd..ea9cdcc 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -903,7 +903,18 @@ public class PlayerConnection implements PacketListenerPlayIn, IUpdatePlayerList
             } else if (s.isEmpty()) {
                 c.warn(this.player.getName() + " tried to send an empty message");
             } else if (getPlayer().isConversing()) {
-                getPlayer().acceptConversationInput(s);
+                // Spigot start
+                final String message = s;
+                this.minecraftServer.processQueue.add( new Waitable()
+                {
+                    @Override
+                    protected Object evaluate()
+                    {
+                        getPlayer().acceptConversationInput( message );
+                        return null;
+                    }
+                } );
+                // Spigot end
             } else if (this.player.getChatFlags() == EnumChatVisibility.SYSTEM) { // Re-add "Command Only" flag check
                 ChatMessage chatmessage = new ChatMessage("chat.cannotSend", new Object[0]);
 
-- 
2.1.0