LogBlock API NPE

As part of my AutoMod plugin I check the owner of the first few blocks that a player breaks, it seems that some of the time an NPE is thrown.

Code:

2012-01-01 14:39:46 [SEVERE] at de.diddiz.LogBlock.QueryParams.getTable(QueryParams.java:120)
2012-01-01 14:39:46 [SEVERE] at de.diddiz.LogBlock.QueryParams.getQuery(QueryParams.java:105)
2012-01-01 14:39:46 [SEVERE] at de.diddiz.LogBlock.LogBlock.getBlockChanges(LogBlock.java:285)
2012-01-01 14:39:46 [SEVERE] at uk.co.jacekk.bukkit.automod.listener.AutoModBlockListener.onBlockBreak(AutoModBlockListener.java:132)
2012-01-01 14:39:46 [SEVERE] at org.bukkit.plugin.java.JavaPluginLoader$40.execute(JavaPluginLoader.java:542)
2012-01-01 14:39:46 [SEVERE] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
2012-01-01 14:39:46 [SEVERE] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:201)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:165)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:501)
2012-01-01 14:39:46 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:208)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.Packet14BlockDig.a(SourceFile:43)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93)
2012-01-01 14:39:46 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
2012-01-01 14:39:46 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

I have seen this in my server.log file but don't seem to be able to reproduce it locally, the coe involved is

Code:

try{
                    QueryParams params = new QueryParams(plugin.logblock);

                    params.loc = event.getBlock().getLocation();
                    params.bct = BlockChangeType.CREATED;
                    params.order = Order.DESC;
                    params.limit = 1;

                    params.needType = true;
                    params.needPlayer = true;

                    for (BlockChange bc : plugin.logblock.getBlockChanges(params)){
                        if (bc.type == blockId && bc.playerName != playerName){
                            plugin.buildDeniedList.addPlayer(player);

                            this.notifyPlayer(player, "Breaking a block not placed by you");

                            break;
                        }
                    }
                }catch (Exception e){
                    plugin.log.warn("LogBlock lookup failed.");

                    e.printStackTrace();
                }

I can't really think of the cause for this, other than there not being a table for the world the player is in.

Any ideas ?

Rather oddly, this seemed to fix it

Code:

QueryParams params = new QueryParams(plugin.logblock);

                    params.loc = event.getBlock().getLocation();
                    params.world = params.loc.getWorld();
                    params.bct = BlockChangeType.CREATED;
                    params.order = Order.DESC;
                    params.limit = 1;

                    params.needType = true;
                    params.needPlayer = true;

                    BlockChange change = plugin.logblock.getBlockChanges(params).get(0);

                    if (change.type == blockId && change.playerName != playerName){
                        plugin.buildDeniedList.addPlayer(player);

                        this.notifyPlayer(player, "Breaking a block not placed by you");
                    }

I guess the world is not taken from the location :s

EDIT by Moderator: merged posts, please use the edit button instead of double posting.