Fixed many non-critical exceptions

Fixed an issue that could result in server hang
Added a new command ::npcsearch for searching for NPC IDs

Server/src/main/core/game/interaction/MovementPulse.java

@@ -194,6 +194,8 @@ public abstract class MovementPulse extends Pulse {
         Location ml = mover.getLocation();
         // Allow being within 1 square of moving entities to interact with them.
         int radius = destination instanceof Entity && ((Entity)destination).getWalkingQueue().hasPath() ? 1 : 0;
+        if (interactLocation == null)
+            return false;
         if (Math.max(Math.abs(ml.getX() - interactLocation.getX()), Math.abs(ml.getY() - interactLocation.getY())) <= radius) {
             try {
                 if (near || pulse()) {

Server/src/main/core/game/node/entity/impl/WalkingQueue.java

@@ -8,6 +8,7 @@ import core.game.world.map.Direction;
 import core.game.world.map.Location;
 import core.game.world.map.Point;
 import core.game.world.map.RegionManager;
+import core.tools.SystemLogger;
 
 import java.util.Deque;
 import java.util.LinkedList;
@@ -374,7 +375,7 @@ public final class WalkingQueue {
 		Location loc = entity.getLocation();
 
 		if (loc == null) {
-			throw new IllegalStateException(
+			SystemLogger.logErr(this.getClass(),
 				"The entity location provided was null."
 				+ "Are you sure anything down the stack trace isn't providing an NPC with a null location?"
 			);

Server/src/main/core/game/system/command/sets/DevelopmentCommandSet.kt

@@ -1,7 +1,7 @@
 package core.game.system.command.sets
 
 import content.global.activity.jobs.JobManager
-import core.api.removeAttribute
+import content.global.skill.slayer.Master
 import core.api.sendMessage
 import core.cache.Cache
 import core.cache.def.impl.DataMap
@@ -179,5 +179,23 @@ class DevelopmentCommandSet : CommandSet(Privilege.ADMIN) {
         define("testpacket") { player, _ ->
             PacketWriteQueue.write(ResetInterface(), PlayerContext(player))
         }
+
+        define("npcsearch", Privilege.STANDARD, "npcsearch name", "Searches for NPCs that match the name either in main or children.") {player, strings ->
+            val name = strings.slice(1 until strings.size).joinToString(" ").lowercase()
+            for (id in 0 until 9000) {
+                val def = NPCDefinition.forId(id)
+                if (def.name.isNotBlank() && (def.name.lowercase().contains(name) || name.contains(def.name.lowercase()))) {
+                    notify(player, "$id - ${def.name}")
+                }
+                else {
+                    for ((childId,index) in def.childNPCIds?.withIndex() ?: continue) {
+                        val childDef = NPCDefinition.forId(childId)
+                        if (childDef.name.lowercase().contains(name) || name.contains(childDef.name.lowercase())) {
+                            notify(player, "$childId child($id) index $index - ${childDef.name}")
+                        }
+                    }
+                }
+            }
+        }
     }
 }