From 27cbe6a4639ab7a3a61efeaa4d6ce1ad3d7cfb6b Mon Sep 17 00:00:00 2001
From: LevelX2 <ludwig.hirth@online.de>
Date: Mon, 18 May 2015 20:56:33 +0200
Subject: [PATCH] * Triggered abilities - Fixed class back to ConcurrentHashMap
 (fixes #966).

---
 Mage/src/mage/abilities/TriggeredAbilities.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Mage/src/mage/abilities/TriggeredAbilities.java b/Mage/src/mage/abilities/TriggeredAbilities.java
index a712c956a02..fe0dd47fe64 100644
--- a/Mage/src/mage/abilities/TriggeredAbilities.java
+++ b/Mage/src/mage/abilities/TriggeredAbilities.java
@@ -47,8 +47,11 @@ import mage.game.permanent.Permanent;
 /**
  *
  * @author BetaSteward_at_googlemail.com
+ * 
+ * This class uses ConcurrentHashMap to avoid ConcurrentModificationExceptions.
+ * See ticket https://github.com/magefree/mage/issues/966 and https://github.com/magefree/mage/issues/473
  */
-public class TriggeredAbilities extends HashMap<String, TriggeredAbility> {
+public class TriggeredAbilities extends ConcurrentHashMap<String, TriggeredAbility> {
 
     private final Map<String, List<UUID>> sources = new HashMap<>();