From 2c0777d29aba75681ab2b1791eb05edd7b5317d4 Mon Sep 17 00:00:00 2001
From: Colin McDonald <macguy8.main@gmail.com>
Date: Sat, 4 Jul 2015 01:10:06 -0400
Subject: [PATCH] Fix AsynchronousExecutor crash


diff --git a/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java b/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java
index 81bb0d15a..1a1ba7c17 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java
@@ -12,6 +12,7 @@ import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
 
+import net.minecraft.server.MinecraftServer;
 import org.apache.commons.lang.Validate;
 
 /**
@@ -263,7 +264,9 @@ public final class AsynchronousExecutor<P, T, C, E extends Throwable> {
     public boolean drop(P parameter, C callback) throws IllegalStateException {
         final Task task = tasks.get(parameter);
         if (task == null) {
-            throw new IllegalStateException("Unknown " + parameter);
+            //throw new IllegalStateException("Unknown " + parameter);
+            MinecraftServer.getLogger().error("Unknown " + parameter + " while running AsynchronousExecutor.drop()!");
+            return false;
         }
         if (!task.callbacks.remove(callback)) {
             throw new IllegalStateException("Unknown " + callback + " for " + parameter);
-- 
2.13.3