Paper/nms-patches/ContainerFurnace.patch

--- a/net/minecraft/server/ContainerFurnace.java
+++ b/net/minecraft/server/ContainerFurnace.java
@@ -1,5 +1,10 @@
 package net.minecraft.server;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.inventory.CraftInventoryFurnace;
+import org.bukkit.craftbukkit.inventory.CraftInventoryView;
+// CraftBukkit end
+
 public abstract class ContainerFurnace extends ContainerRecipeBook<IInventory> {
 
     private final IInventory furnace;
@@ -7,6 +12,22 @@
     protected final World c;
     private final Recipes<? extends RecipeCooking> f;
 
+    // CraftBukkit start
+    private CraftInventoryView bukkitEntity = null;
+    private PlayerInventory player;
+
+    @Override
+    public CraftInventoryView getBukkitView() {
+        if (bukkitEntity != null) {
+            return bukkitEntity;
+        }
+
+        CraftInventoryFurnace inventory = new CraftInventoryFurnace((TileEntityFurnace) this.furnace);
+        bukkitEntity = new CraftInventoryView(this.player.player.getBukkitEntity(), inventory, this);
+        return bukkitEntity;
+    }
+    // CraftBukkit end
+
     protected ContainerFurnace(Containers<?> containers, Recipes<? extends RecipeCooking> recipes, int i, PlayerInventory playerinventory) {
         this(containers, recipes, i, playerinventory, new InventorySubcontainer(3), new ContainerProperties(4));
     }
@@ -22,6 +43,7 @@
         this.a(new Slot(iinventory, 0, 56, 17));
         this.a((Slot) (new SlotFurnaceFuel(this, iinventory, 1, 56, 53)));
         this.a((Slot) (new SlotFurnaceResult(playerinventory.player, iinventory, 2, 116, 35)));
+        this.player = playerinventory; // CraftBukkit - save player
 
         int j;
 
@@ -53,7 +75,7 @@
 
     @Override
     public void a(boolean flag, IRecipe<?> irecipe, EntityPlayer entityplayer) {
-        (new AutoRecipeFurnace<>(this)).a(entityplayer, irecipe, flag);
+        (new AutoRecipeFurnace(this)).a(entityplayer, irecipe, flag); // CraftBukkit - decompile error
     }
 
     @Override
@@ -78,6 +100,7 @@
 
     @Override
     public boolean canUse(EntityHuman entityhuman) {
+        if (!this.checkReachable) return true; // CraftBukkit
         return this.furnace.a(entityhuman);
     }
 
@@ -133,7 +156,7 @@
     }
 
     protected boolean a(ItemStack itemstack) {
-        return this.c.getCraftingManager().craft(this.f, new InventorySubcontainer(new ItemStack[]{itemstack}), this.c).isPresent();
+        return this.c.getCraftingManager().craft((Recipes<RecipeCooking>) this.f, new InventorySubcontainer(new ItemStack[]{itemstack}), this.c).isPresent(); // Eclipse fail
     }
 
     protected boolean b(ItemStack itemstack) {