Gradle update / Block inventory improved / Crash fixes

core/src/io/anuke/mindustry/entities/Player.java

@@ -392,32 +392,34 @@ public class Player extends Unit implements BuilderTrait, CarryTrait, ShooterTra
 
 	/**Draw all current build requests. Does not draw the beam effect, only the positions.*/
 	public void drawBuildRequests(){
-		for (BuildRequest request : getPlaceQueue()) {
+		synchronized (getPlaceQueue()) {
+			for (BuildRequest request : getPlaceQueue()) {
 
-			if(request.remove){
-                Block block = world.tile(request.x, request.y).target().block();
+				if (request.remove) {
+					Block block = world.tile(request.x, request.y).target().block();
 
-				//draw removal request
-                Draw.color(Palette.remove);
+					//draw removal request
+					Draw.color(Palette.remove);
 
-                Lines.stroke((1f-request.progress));
+					Lines.stroke((1f - request.progress));
 
-                Lines.poly(request.x * tilesize + block.offset(),
-                        request.y * tilesize + block.offset(),
-                        4, block.size * tilesize /2f, 45 + 15);
-			}else{
-				//draw place request
-				Draw.color(Palette.accent);
+					Lines.poly(request.x * tilesize + block.offset(),
+							request.y * tilesize + block.offset(),
+							4, block.size * tilesize / 2f, 45 + 15);
+				} else {
+					//draw place request
+					Draw.color(Palette.accent);
 
-				Lines.stroke((1f-request.progress));
+					Lines.stroke((1f - request.progress));
 
-				Lines.poly(request.x * tilesize + request.recipe.result.offset(),
-						request.y * tilesize + request.recipe.result.offset(),
-						4, request.recipe.result.size * tilesize /2f, 45 + 15);
+					Lines.poly(request.x * tilesize + request.recipe.result.offset(),
+							request.y * tilesize + request.recipe.result.offset(),
+							4, request.recipe.result.size * tilesize / 2f, 45 + 15);
+				}
 			}
-		}
 
-		Draw.reset();
+			Draw.reset();
+		}
 	}
 
 	//endregion

core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java

@@ -65,11 +65,13 @@ public interface BuilderTrait {
     /**If a place request matching this signature is present, it is removed.
      * Otherwise, a new place request is added to the queue.*/
     default void replaceBuilding(int x, int y, int rotation, Recipe recipe){
-        for(BuildRequest request : getPlaceQueue()){
-            if(request.x == x && request.y == y){
-                clearBuilding();
-                addBuildRequest(request);
-                return;
+        synchronized (getPlaceQueue()) {
+            for (BuildRequest request : getPlaceQueue()) {
+                if (request.x == x && request.y == y) {
+                    clearBuilding();
+                    addBuildRequest(request);
+                    return;
+                }
             }
         }
 
@@ -85,14 +87,16 @@ public interface BuilderTrait {
         }
     }
 
-    /**Add another build requests to the tail of the queue.*/
+    /**Add another build requests to the tail of the queue, if it doesn't exist there yet.*/
     default void addBuildRequest(BuildRequest place){
-        for(BuildRequest request : getPlaceQueue()){
-            if(request.x == place.x && request.y == place.y){
-                return;
+        synchronized (getPlaceQueue()) {
+            for (BuildRequest request : getPlaceQueue()) {
+                if (request.x == place.x && request.y == place.y) {
+                    return;
+                }
             }
+            getPlaceQueue().addLast(place);
         }
-        getPlaceQueue().addLast(place);
     }
 
     /**Return the build requests currently active, or the one at the top of the queue.