Fixed infinite place distance, impact meltdown

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

@@ -62,6 +62,8 @@ public interface BuilderTrait extends Entity, TeamTrait{
 
         BuildRequest current = buildRequest();
 
+        if(dst(current.tile()) > finalPlaceDst) return;
+
         Tile tile = world.tile(current.x, current.y);
 
         if(!(tile.block() instanceof BuildBlock)){

core/src/io/anuke/mindustry/world/blocks/power/ImpactReactor.java

@@ -133,7 +133,7 @@ public class ImpactReactor extends PowerGenerator{
 
         FusionReactorEntity entity = tile.entity();
 
-        if(entity.warmup < 0.4f) return;
+        if(entity.warmup < 0.4f || !state.rules.reactorExplosions) return;
 
         Sounds.explosionbig.at(tile);