diff --git a/code/datums/components/crafting/craft.dm b/code/datums/components/crafting/craft.dm
index 8ebd52522a..3283c514b8 100644
--- a/code/datums/components/crafting/craft.dm
+++ b/code/datums/components/crafting/craft.dm
@@ -209,10 +209,9 @@
 						var/obj/item/reagent_containers/food/food_result = I
 						var/total_quality = 0
 						var/total_items = 0
-						for(var/obj/item/ingredient in parts)
-							var/obj/item/reagent_containers/food/food_ingredient = ingredient
+						for(var/obj/item/reagent_containers/food/ingredient in parts)
 							total_items += 1
-							total_quality += food_ingredient.food_quality
+							total_quality += ingredient.food_quality
 						if(total_items == 0)
 							food_result.adjust_food_quality(50)
 						else
diff --git a/code/datums/dna.dm b/code/datums/dna.dm
index 8f7a8ca72f..26786da776 100644
--- a/code/datums/dna.dm
+++ b/code/datums/dna.dm
@@ -152,10 +152,11 @@
 	return .
 
 /datum/dna/proc/generate_dna_blocks()
-	var/bonus
+	var/list/mutations_temp = GLOB.good_mutations + GLOB.bad_mutations + GLOB.not_good_mutations
 	if(species && species.inert_mutation)
-		bonus = GET_INITIALIZED_MUTATION(species.inert_mutation)
-	var/list/mutations_temp = GLOB.good_mutations + GLOB.bad_mutations + GLOB.not_good_mutations + bonus
+		var/bonus = GET_INITIALIZED_MUTATION(species.inert_mutation)
+		if(bonus)
+			mutations_temp += bonus
 	if(!LAZYLEN(mutations_temp))
 		return
 	mutation_index.Cut()
diff --git a/code/modules/mob/living/simple_animal/hostile/mining_mobs/ice_demon.dm b/code/modules/mob/living/simple_animal/hostile/mining_mobs/ice_demon.dm
index 7b9abd2b13..88ee27fcc9 100644
--- a/code/modules/mob/living/simple_animal/hostile/mining_mobs/ice_demon.dm
+++ b/code/modules/mob/living/simple_animal/hostile/mining_mobs/ice_demon.dm
@@ -55,8 +55,9 @@
 		if(isclosedturf(T))
 			continue
 		possible_ends |= T
-	var/turf/end = pick(possible_ends)
-	do_teleport(src, end, 0,  channel=TELEPORT_CHANNEL_BLUESPACE, forced = TRUE)
+	if(length(possible_ends))
+		var/turf/end = pick(possible_ends)
+		do_teleport(src, end, 0,  channel=TELEPORT_CHANNEL_BLUESPACE, forced = TRUE)
 	SLEEP_CHECK_DEATH(8)
 	return ..()
 
diff --git a/code/modules/mob/living/simple_animal/hostile/mining_mobs/mining_mobs.dm b/code/modules/mob/living/simple_animal/hostile/mining_mobs/mining_mobs.dm
index 71c6d61d5d..6ad869afe6 100644
--- a/code/modules/mob/living/simple_animal/hostile/mining_mobs/mining_mobs.dm
+++ b/code/modules/mob/living/simple_animal/hostile/mining_mobs/mining_mobs.dm
@@ -63,7 +63,7 @@
 	..(gibbed)
 
 /mob/living/simple_animal/hostile/asteroid/proc/spawn_crusher_loot()
-	butcher_results[crusher_loot] = 1
+	LAZYSET(butcher_results, crusher_loot, 1)
 
 /mob/living/simple_animal/hostile/asteroid/handle_temperature_damage()
 	if(bodytemperature < minbodytemp)