From 7a212ee9a8837cc5f3aca50aa2d80b24a6865d1e Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 19 Dec 2016 23:38:57 -0500
Subject: [PATCH] Ignore invalid Marker Icon ID's in maps

Replace with the red marker. Should of only happened by creative abuse.

diff --git a/src/main/java/net/minecraft/server/WorldMap.java b/src/main/java/net/minecraft/server/WorldMap.java
index dbe6a80f2..dfd8e4d84 100644
--- a/src/main/java/net/minecraft/server/WorldMap.java
+++ b/src/main/java/net/minecraft/server/WorldMap.java
@@ -194,7 +194,11 @@ public class WorldMap extends PersistentBase {
                 // Spigot - start
                 UUID uuid = UUID.nameUUIDFromBytes(nbttagcompound.getString("id").getBytes(Charsets.US_ASCII));
                 if (!this.decorations.containsKey(uuid)) {
-                    this.a(MapIcon.Type.a(nbttagcompound.getByte("type")), entityhuman.world, uuid, nbttagcompound.getDouble("x"), nbttagcompound.getDouble("z"), nbttagcompound.getDouble("rot"));
+                    // Paper start - protect against bad map icon indexes
+                    byte iconId = nbttagcompound.getByte("type");
+                    MapIcon.Type[] values = MapIcon.Type.values();
+                    this.a(values.length > iconId ? values[iconId] : values[2], entityhuman.world, uuid, nbttagcompound.getDouble("x"), nbttagcompound.getDouble("z"), nbttagcompound.getDouble("rot"));
+                    // Paper end
                     // Spigot - end
                 }
             }
-- 
2.12.2