From 9ba67cedf1cf9046ed571c9f4ddb8eda9e4dac6f Mon Sep 17 00:00:00 2001
From: Ben Staddon <bs2609@users.noreply.github.com>
Date: Fri, 2 Aug 2019 21:43:12 +0100
Subject: [PATCH] Fix concurrent modification when loading chunk tickets
 (#5876)

---
 .../java/net/minecraftforge/common/ForgeChunkManager.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/net/minecraftforge/common/ForgeChunkManager.java b/src/main/java/net/minecraftforge/common/ForgeChunkManager.java
index d0a917d6f1..e3710d186c 100644
--- a/src/main/java/net/minecraftforge/common/ForgeChunkManager.java
+++ b/src/main/java/net/minecraftforge/common/ForgeChunkManager.java
@@ -585,8 +585,8 @@ public class ForgeChunkManager
                 }
                 if (tickets.size() > maxTicketLength)
                 {
-                    FMLLog.log.warn("The mod {} has too many open chunkloading tickets {}. Excess will be dropped", modId, tickets.size());
-                    tickets.subList(maxTicketLength, tickets.size()).clear();
+                    FMLLog.log.warn("The mod {} has too many open chunkloading tickets: {} (max: {}). Excess will be dropped.", modId, tickets.size(), maxTicketLength);
+                    tickets = tickets.subList(0, maxTicketLength);
                 }
                 ForgeChunkManager.tickets.get(world).putAll(modId, tickets);
                 loadingCallback.ticketsLoaded(ImmutableList.copyOf(tickets), world);