From 8716695d4e24bb4e78e5dcc653f1d557b288dd26 Mon Sep 17 00:00:00 2001
From: Timmeey86 <Timmeey86@users.noreply.github.com>
Date: Thu, 1 Nov 2018 02:13:51 +0100
Subject: [PATCH] Fixed a crash which could occur when unconstructing
 environment (#290)

---
 .../mindustry/entities/units/types/Drone.java      | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/core/src/io/anuke/mindustry/entities/units/types/Drone.java b/core/src/io/anuke/mindustry/entities/units/types/Drone.java
index 244f5ef455..1af4018725 100644
--- a/core/src/io/anuke/mindustry/entities/units/types/Drone.java
+++ b/core/src/io/anuke/mindustry/entities/units/types/Drone.java
@@ -79,12 +79,14 @@ public class Drone extends FlyingUnit implements BuilderTrait{
                 }
 
                 //if it's missing requirements, try and mine them
-                for(ItemStack stack : entity.recipe.requirements){
-                    if(!core.items.has(stack.item, stack.amount) && type.toMine.contains(stack.item)){
-                        targetItem = stack.item;
-                        getPlaceQueue().clear();
-                        setState(mine);
-                        return;
+                if(entity.recipe != null){
+                    for(ItemStack stack : entity.recipe.requirements){
+                        if(!core.items.has(stack.item, stack.amount) && type.toMine.contains(stack.item)){
+                            targetItem = stack.item;
+                            getPlaceQueue().clear();
+                            setState(mine);
+                            return;
+                        }
                     }
                 }