+ Added fix for leader-board attempting to display non-existing user

src/commands/general/CommandLeaderboard.java

@@ -83,13 +83,17 @@ public class CommandLeaderboard extends Command
 		embed.title = LocStrings.stub("LeaderboardTitle");
 		embed.descriptionText = "";
 		
-		for(int i = 0; i < listSize && i < users.size(); ++i)
+		int indexToDisplay = 1;
+		for(int i = 0; indexToDisplay <= listSize && i < users.size(); ++i)
 		{
 			// Only now that we've sorted do we do the full construction and caching of users
 			Pair<Long, String> userPair = users.get(i);
 			KittyUser cachedUser = ObjectBuilderFactory.getKittyUser(guildID, userPair.Second);
 			
-			embed.descriptionText += "**" + (i + 1) + ":** " + userPair.First + " - " + cachedUser.name;
+			if(cachedUser == null)
+				continue; 
+			
+			embed.descriptionText += "**" + (indexToDisplay++) + ":** " + userPair.First + " - " + cachedUser.name;
 			embed.descriptionText += "\n";
 		}
 		

src/core/ObjectBuilderFactory.java

@@ -319,8 +319,13 @@ public class ObjectBuilderFactory
 		if(user == null)
 		{
 			Guild jdaGuild = kitty.getGuildById(guildID);
+			if(jdaGuild == null) return null;
+			
 			Member jdaMember = jdaGuild.getMemberById(userID);
+			if(jdaMember == null) return null;
+			
 			User jdaUser = jdaMember.getUser();
+			if(jdaUser == null) return null;
 			
 			user = extractUserByJDAUser(guildID, jdaMember.getNickname(), jdaUser.getId(), jdaUser.getAvatarUrl(), jdaUser.getId());
 			updateUser(user, jdaMember);