From 8df21a74973014abf47f6cd652cbed10415c8077 Mon Sep 17 00:00:00 2001
From: liujiahua123123 <liujiahua123123@126.com>
Date: Sat, 17 Aug 2019 16:01:53 +0800
Subject: [PATCH] GC

---
 .../src/main/java/net/mamoe/mirai/event/MiraiEventHook.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
index 9335283cb..6264c74d3 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
@@ -36,7 +36,7 @@ public class MiraiEventHook<T extends MiraiEvent> implements Closeable {
     private Predicate<T> valid;
 
     public MiraiEventHook(Class<T> eventClass) {
-        this(eventClass,a -> {});
+        this(eventClass,null);
     }
 
     public MiraiEventHook(Class<T> eventClass, Consumer<T> handler){
@@ -92,10 +92,12 @@ public class MiraiEventHook<T extends MiraiEvent> implements Closeable {
     }
 
     public void mount(){
+        if(this.handler == null)this.handler = a -> {};
         MiraiEventManager.getInstance().registerHook(this);
     }
 
     public void mountOnce(){
+        if(this.handler == null)this.handler = a -> {};
         MiraiEventManager.getInstance().hookOnce(this);
     }