Various crashes fixed

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

@@ -202,6 +202,11 @@ public interface BuilderTrait extends Entity{
         //otherwise, update it.
         BuildEntity entity = tile.entity();
 
+        if(entity == null){
+            getPlaceQueue().removeFirst();
+            return;
+        }
+
         //deconstructing is 2x as fast
         if(current.remove){
             entity.deconstruct(unit, core, 2f / entity.buildCost * Timers.delta() * getBuildPower(tile));

core/src/io/anuke/mindustry/entities/units/types/Drone.java

@@ -429,7 +429,7 @@ public class Drone extends FlyingUnit implements BuilderTrait{
     @Override
     public void write(DataOutput data) throws IOException{
         super.write(data);
-        data.writeInt(mineTile == null ? -1 : mineTile.packedPosition());
+        data.writeInt(mineTile == null || !state.is(mine) ? -1 : mineTile.packedPosition());
         data.writeInt(state.is(repair) && target instanceof TileEntity ? ((TileEntity)target).tile.packedPosition() : -1);
         writeBuilding(data);
     }

core/src/io/anuke/mindustry/maps/generation/FortressGenerator.java

@@ -128,7 +128,7 @@ public class FortressGenerator{
         int maxIndex = (int)(1 + ((float)gen.sector.difficulty / maxDifficulty * (structures.length-2)));
 
         for(int i = maxIndex/2; i < maxIndex; i++){
-            selected.add(structures[i]);
+            selected.add(structures[Math.min(i, structures.length-1)]);
         }
 
         float baseChance = 0.8f / selected.size;

core/src/io/anuke/mindustry/maps/generation/WorldGenerator.java

@@ -242,7 +242,7 @@ public class WorldGenerator{
         int x = sectorX * sectorSize + localX + Short.MAX_VALUE;
         int y = sectorY * sectorSize + localY + Short.MAX_VALUE;
 
-        Block floor;
+        Block floor = Blocks.stone;
         Block wall = Blocks.air;
 
         double ridge = rid.getValue(x, y, 1f / 400f);
@@ -283,7 +283,7 @@ public class WorldGenerator{
             if(iceridge > 0.25 && minDst > lerpDst/1.5f){
                 elevation ++;
             }
-        }else{
+        }else if(minDst > lerpDst/1.5f){
             floor = Blocks.lava;
         }
 

core/src/io/anuke/mindustry/ui/ContentDisplay.java

@@ -96,8 +96,6 @@ public class ContentDisplay{
         table.row();
         table.add(Bundles.format("text.item.fluxiness", (int) (item.fluxiness * 100)));
         table.row();
-        table.add(Bundles.format("text.item.hardness", item.hardness));
-        table.row();
     }
 
     public static void displayLiquid(Table table, Liquid liquid){

core/src/io/anuke/mindustry/ui/fragments/BlockInventoryFragment.java

@@ -89,7 +89,7 @@ public class BlockInventoryFragment extends Fragment{
         table.background("inventory");
         table.setTouchable(Touchable.enabled);
         table.update(() -> {
-            if(tile == null || tile.entity == null || !tile.block().isAccessible() || tile.entity.items.total() == 0){
+            if(state.is(State.menu) || tile == null || tile.entity == null || !tile.block().isAccessible() || tile.entity.items.total() == 0){
                 hide();
             }else{
                 if(holding && lastItem != null){

core/src/io/anuke/mindustry/world/blocks/distribution/Conveyor.java

@@ -98,7 +98,7 @@ public class Conveyor extends Block{
         byte rotation = tile.getRotation();
 
         int frame = entity.clogHeat <= 0.5f ? (int) ((Timers.time() / 4f) % 4) : 0;
-        Draw.rect(regions[entity.blendbits][frame], tile.drawx(), tile.drawy(),
+        Draw.rect(regions[Mathf.clamp(entity.blendbits, 0, regions.length - 1)][Mathf.clamp(frame, 0, regions[0].length - 1)], tile.drawx(), tile.drawy(),
             tilesize * entity.blendsclx, tilesize * entity.blendscly, rotation*90);
     }
 

core/src/io/anuke/mindustry/world/blocks/distribution/MassDriver.java

@@ -238,7 +238,7 @@ public class MassDriver extends Block{
 
     protected boolean linkValid(Tile tile){
         MassDriverEntity entity = tile.entity();
-        if(entity.link == -1) return false;
+        if(entity == null || entity.link == -1) return false;
         Tile link = world.tile(entity.link);
 
         return link != null && link.block() instanceof MassDriver && tile.distanceTo(link) <= range;

core/src/io/anuke/mindustry/world/blocks/production/Drill.java

@@ -234,6 +234,7 @@ public class Drill extends Block{
     }
 
     protected boolean isValid(Tile tile){
+        if(tile == null) return false;
         ItemStack drops = tile.floor().drops;
         return drops != null && drops.item.hardness <= tier;
     }

core/src/io/anuke/mindustry/world/blocks/production/SolidPump.java

@@ -107,6 +107,7 @@ public class SolidPump extends Pump{
 
     @Override
     protected boolean isValid(Tile tile){
+        if(tile == null) return false;
         return !tile.floor().isLiquid;
     }
 

core/src/io/anuke/mindustry/world/consumers/ConsumeItem.java

@@ -48,7 +48,7 @@ public class ConsumeItem extends Consume{
 
     @Override
     public boolean valid(Block block, TileEntity entity){
-        return entity.items.has(item, amount);
+        return entity != null && entity.items != null && entity.items.has(item, amount);
     }
 
     @Override