From 36f3accf4bdd9a562adf8000d554c939caea7489 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Sat, 23 Dec 2017 10:55:25 +0000
Subject: [PATCH] Effect: Don't allow cancellation of expired effect removal,
 close #1770

---
 src/pocketmine/event/entity/EntityEffectRemoveEvent.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/pocketmine/event/entity/EntityEffectRemoveEvent.php b/src/pocketmine/event/entity/EntityEffectRemoveEvent.php
index cb3a8aaf9..32131fe33 100644
--- a/src/pocketmine/event/entity/EntityEffectRemoveEvent.php
+++ b/src/pocketmine/event/entity/EntityEffectRemoveEvent.php
@@ -29,4 +29,11 @@ namespace pocketmine\event\entity;
 class EntityEffectRemoveEvent extends EntityEffectEvent{
 	public static $handlerList = null;
 
+	public function setCancelled(bool $value = true){
+		if($this->getEffect()->getDuration() <= 0){
+			throw new \InvalidStateException("Removal of expired effects cannot be cancelled");
+		}
+		parent::setCancelled($value);
+	}
+
 }