Fixed #1601

core/src/mindustry/world/blocks/distribution/OverflowGate.java

@@ -9,6 +9,8 @@ import mindustry.world.meta.BlockGroup;
 
 import java.io.*;
 
+import static mindustry.Vars.world;
+
 public class OverflowGate extends Block{
     public float speed = 1f;
     public boolean invert = false;
@@ -125,19 +127,24 @@ public class OverflowGate extends Block{
 
         @Override
         public byte version(){
-            return 2;
+            return 3;
         }
 
         @Override
         public void write(DataOutput stream) throws IOException{
             super.write(stream);
+            stream.writeInt(lastInput == null ? Pos.invalid : lastInput.pos());
         }
 
         @Override
         public void read(DataInput stream, byte revision) throws IOException{
             super.read(stream, revision);
+
             if(revision == 1){
                 new DirectionalItemBuffer(25, 50f).read(stream);
+            }else if(revision == 3){
+                lastInput = world.tile(stream.readInt());
+                lastItem = items.first();
             }
         }
     }

core/src/mindustry/world/modules/ItemModule.java

@@ -1,10 +1,9 @@
 package mindustry.world.modules;
 
-import mindustry.type.Item;
-import mindustry.type.ItemStack;
+import mindustry.type.*;
 
 import java.io.*;
-import java.util.Arrays;
+import java.util.*;
 
 import static mindustry.Vars.content;
 
@@ -69,15 +68,24 @@ public class ItemModule extends BlockModule{
         return total;
     }
 
+    public Item first(){
+        for(int i = 0; i < items.length; i++){
+            if(items[i] > 0){
+                return content.item(i);
+            }
+        }
+        return null;
+    }
+
     public Item take(){
         for(int i = 0; i < items.length; i++){
             int index = (i + takeRotation);
-            if(index >= items.length) index -= items.length; //conditional instead of mod
+            if(index >= items.length) index -= items.length;
             if(items[index] > 0){
                 items[index] --;
                 total --;
                 takeRotation = index + 1;
-                return content.item(index % items.length);
+                return content.item(index);
             }
         }
         return null;