Add validation checks to CraftPlayer.teleport

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -487,6 +487,10 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public boolean teleport(Location location, PlayerTeleportEvent.TeleportCause cause) {
+        Preconditions.checkArgument(location != null, "location");
+        Preconditions.checkArgument(location.getWorld() != null, "location.world");
+        location.checkFinite();
+
         EntityPlayer entity = getHandle();
 
         if (getHealth() == 0 || entity.dead) {