From 78bb5f171f946b25afb1d9d82d9ec760e1638a8d Mon Sep 17 00:00:00 2001
From: KennyTV <jahnke.nassim@gmail.com>
Date: Thu, 27 Aug 2020 09:37:51 +0200
Subject: [PATCH] Fix IOB in 1.13 recipe request Fixes #2039

---
 .../protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java
index 1ed868c52..64dd82739 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java
@@ -841,9 +841,10 @@ public class Protocol1_13To1_12_2 extends Protocol<ClientboundPackets1_12_1, Cli
                         int type = wrapper.get(Type.VAR_INT, 0);
 
                         if (type == 0) {
-                            Integer id = Ints.tryParse(wrapper.read(Type.STRING).substring(18));
+                            String s = wrapper.read(Type.STRING);
+                            Integer id;
                             // Custom recipes
-                            if (id == null) {
+                            if (s.length() < 19 || (id = Ints.tryParse(s.substring(18))) == null) {
                                 wrapper.cancel();
                                 return;
                             }