Fixes issue #210 "Dupe bug in crafting grid"

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Refined Storage Changelog
 
+### 0.8.12
+**Bugfixes**
+- Fixed dupe bug when shift clicking output slot in grid
+
 ### 0.8.11
 **Bugfixes**
 - Fixed minor dupe bug with JEI transferring

src/main/java/refinedstorage/container/ContainerGrid.java

@@ -96,14 +96,16 @@ public class ContainerGrid extends ContainerBase {
         if (!player.worldObj.isRemote) {
             Slot slot = inventorySlots.get(slotIndex);
 
+            if (slot.getHasStack()) {
                 if (slot == craftingResultSlot) {
                     ((TileGrid) grid).onCraftedShift(this, player);
-            } else if (grid.getGridHandler() != null && slot != patternResultSlot && !(slot instanceof SlotSpecimenLegacy) && slot.getHasStack()) {
+                } else if (grid.getGridHandler() != null && slot != patternResultSlot && !(slot instanceof SlotSpecimenLegacy)) {
                     slot.putStack(grid.getGridHandler().onInsert(slot.getStack()));
 
                     detectAndSendChanges();
                 }
             }
+        }
 
         return null;
     }