From 9d6768d53e4e3911c7ba2f5abbbb4a9772d46ee1 Mon Sep 17 00:00:00 2001
From: zml <zach@zachsthings.com>
Date: Mon, 3 Nov 2014 11:40:29 -0800
Subject: [PATCH] Fix UUID convert command. Closes #1692

---
 .../tehkode/permissions/bukkit/commands/UtilityCommands.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/ru/tehkode/permissions/bukkit/commands/UtilityCommands.java b/src/main/java/ru/tehkode/permissions/bukkit/commands/UtilityCommands.java
index a5d9d9729..027ab8437 100644
--- a/src/main/java/ru/tehkode/permissions/bukkit/commands/UtilityCommands.java
+++ b/src/main/java/ru/tehkode/permissions/bukkit/commands/UtilityCommands.java
@@ -38,6 +38,7 @@
 
 import java.io.File;
 import java.util.Collection;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -165,8 +166,8 @@ public void convertUUID(final PermissionsEx plugin, final CommandSender sender,
 			return;
 		}
 		final ProfileRepository repo = new HttpProfileRepository("minecraft");
-		final Collection<String> userIdentifiers = backend.getUserIdentifiers();
-		for (Iterator<String> it = backend.getUserIdentifiers().iterator(); it.hasNext(); ) {
+		final Collection<String> userIdentifiers = new HashSet<>(backend.getUserIdentifiers());
+		for (Iterator<String> it = userIdentifiers.iterator(); it.hasNext(); ) {
 			try {
 				UUID.fromString(it.next());
 				it.remove();