From d202278ccd6876f8113d26951e6bd018f6e9b792 Mon Sep 17 00:00:00 2001
From: Evan Kranzler <theelk801@gmail.com>
Date: Sun, 13 Jun 2021 10:13:41 -0400
Subject: [PATCH] change to containsKey method to prevent stream exceptions
 (fixes #7904, fixes #7880, fixes #7844, fixes #7810, fixes #7805, fixes
 #7675, fixes #7669, fixes #7654, fixes #7651)

---
 Mage/src/main/java/mage/abilities/AbilitiesImpl.java | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Mage/src/main/java/mage/abilities/AbilitiesImpl.java b/Mage/src/main/java/mage/abilities/AbilitiesImpl.java
index 2c69d020bf4..0bab0434c01 100644
--- a/Mage/src/main/java/mage/abilities/AbilitiesImpl.java
+++ b/Mage/src/main/java/mage/abilities/AbilitiesImpl.java
@@ -261,7 +261,15 @@ public class AbilitiesImpl<T extends Ability> extends ArrayList<T> implements Ab
 
     @Override
     public boolean containsKey(UUID abilityId) { // TODO: remove
-        return stream().map(T::getId).anyMatch(abilityId::equals);
+        if (abilityId == null) {
+            return false;
+        }
+        for (T ability : this) {
+            if (ability != null && abilityId.equals(ability.getId())) {
+                return true;
+            }
+        }
+        return false;
     }
 
     @Override