From b97fbd317130c036dc03746ea6d00e12e19612b5 Mon Sep 17 00:00:00 2001
From: catbref <misc-github@talk2dom.com>
Date: Fri, 7 Aug 2020 16:19:32 +0100
Subject: [PATCH] Bug-fix for cached online accounts

---
 src/main/java/org/qortal/controller/Controller.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/qortal/controller/Controller.java b/src/main/java/org/qortal/controller/Controller.java
index ac4e34e7..0e8d09d5 100644
--- a/src/main/java/org/qortal/controller/Controller.java
+++ b/src/main/java/org/qortal/controller/Controller.java
@@ -1484,7 +1484,9 @@ public class Controller extends Thread {
 			if (this.latestBlocksOnlineAccounts.size() == MAX_BLOCKS_CACHED_ONLINE_ACCOUNTS)
 				this.latestBlocksOnlineAccounts.pollLast();
 
-			this.latestBlocksOnlineAccounts.addFirst(Collections.unmodifiableList(latestBlocksOnlineAccounts));
+			this.latestBlocksOnlineAccounts.addFirst(latestBlocksOnlineAccounts == null
+					? Collections.emptyList()
+					: Collections.unmodifiableList(latestBlocksOnlineAccounts));
 		}
 	}