diff --git a/code/datums/uplink/uplink_categories.dm b/code/datums/uplink/uplink_categories.dm
index bdbc9d5f1d4..6817b7464bb 100644
--- a/code/datums/uplink/uplink_categories.dm
+++ b/code/datums/uplink/uplink_categories.dm
@@ -17,7 +17,7 @@
 		if(item.can_view(U))
 			return 1
 
-	if(!antag_roles.len)
+	if(!LAZYLEN(antag_roles))
 		return 1
 
 	return 0
diff --git a/code/modules/integrated_electronics/core/helpers.dm b/code/modules/integrated_electronics/core/helpers.dm
index e221d0c656f..35f7c60374b 100644
--- a/code/modules/integrated_electronics/core/helpers.dm
+++ b/code/modules/integrated_electronics/core/helpers.dm
@@ -40,8 +40,6 @@
 	A.push_data()
 
 /datum/integrated_io/proc/get_data()
-	if(isnull(data))
-		return
 	if(isweakref(data))
 		return data.resolve()
 	return data
diff --git a/code/modules/integrated_electronics/subtypes/logic.dm b/code/modules/integrated_electronics/subtypes/logic.dm
index 8bf55649ec5..60edfa66859 100644
--- a/code/modules/integrated_electronics/subtypes/logic.dm
+++ b/code/modules/integrated_electronics/subtypes/logic.dm
@@ -1,7 +1,7 @@
 /obj/item/integrated_circuit/logic
 	name = "logic gate"
 	desc = "This tiny chip will decide for you!"
-	extended_desc = "Logic circuits will treat a null, 0, and a \"\" string value as FALSE and anything else as TRUE."
+	extended_desc = "Logic circuits will treat a null, 0, and a \"\" string value as FALSE and anything else as TRUE. If inputs are of mismatching type, expect undocumented behaviour."
 	complexity = 3
 	outputs = list("result" = IC_PINTYPE_BOOLEAN)
 	activators = list("compare" = IC_PINTYPE_PULSE_IN)
@@ -22,7 +22,11 @@
 /obj/item/integrated_circuit/logic/binary/do_work()
 	var/data1 = get_pin_data(IC_INPUT, 1)
 	var/data2 = get_pin_data(IC_INPUT, 2)
-	var/result = !!do_compare(data1, data2)
+
+	var/result = FALSE
+	if (comparable(data1, data2))
+		result = !!do_compare(data1, data2)
+
 	set_pin_data(IC_OUTPUT, 1, result)
 	push_data()
 
@@ -34,6 +38,18 @@
 /obj/item/integrated_circuit/logic/binary/proc/do_compare(A, B)
 	return FALSE
 
+/obj/item/integrated_circuit/logic/binary/proc/comparable(A, B)
+	if (isnum(A) && isnum(B))
+		. = TRUE
+	else if (istext(A) && istext(B))
+		. = TRUE
+	else if (islist(A) && islist(B))
+		. = TRUE
+	else if (isdatum(A) && isdatum(B))
+		. = TRUE
+	else
+		. = FALSE
+
 /obj/item/integrated_circuit/logic/unary
 	inputs = list(
 		"A" = IC_PINTYPE_ANY
diff --git a/code/modules/mob/living/bot/cleanbot.dm b/code/modules/mob/living/bot/cleanbot.dm
index 5ecae44b822..7b358cbed0b 100644
--- a/code/modules/mob/living/bot/cleanbot.dm
+++ b/code/modules/mob/living/bot/cleanbot.dm
@@ -291,7 +291,7 @@ var/list/cleanbot_types // Going to use this to generate a list of types once th
 			get_targets()
 		if("patrol")
 			should_patrol = !should_patrol
-			patrol_path = null
+			patrol_path = list()
 		if("freq")
 			var/freq = text2num(input("Select frequency for  navigation beacons", "Frequnecy", num2text(beacon_freq / 10))) * 10
 			if (freq > 0)
diff --git a/code/modules/organs/subtypes/parasite.dm b/code/modules/organs/subtypes/parasite.dm
index eebe0dae190..4eb1a32964c 100644
--- a/code/modules/organs/subtypes/parasite.dm
+++ b/code/modules/organs/subtypes/parasite.dm
@@ -48,6 +48,9 @@
 /obj/item/organ/parasite/kois/process()
 	..()
 
+	if (!owner)
+		return
+
 	if(prob(10) && !(owner.species.flags & NO_PAIN))
 		owner << "<span class='warning'>You feel a stinging pain in your abdomen!</span>"
 		owner.emote("me",1,"winces slightly.")
diff --git a/code/modules/power/singularity/particle_accelerator/particle_control.dm b/code/modules/power/singularity/particle_accelerator/particle_control.dm
index 4b60296d329..586e4fc006e 100644
--- a/code/modules/power/singularity/particle_accelerator/particle_control.dm
+++ b/code/modules/power/singularity/particle_accelerator/particle_control.dm
@@ -94,7 +94,7 @@
 
 	if(href_list["togglep"])
 		if(!wires.IsIndexCut(PARTICLE_TOGGLE_WIRE))
-			src.toggle_power()
+			src.toggle_power(usr)
 	else if(href_list["scan"])
 		src.part_scan()
 
@@ -212,11 +212,11 @@
 	return 0
 
 
-/obj/machinery/particle_accelerator/control_box/proc/toggle_power()
+/obj/machinery/particle_accelerator/control_box/proc/toggle_power(mob/user)
 	src.active = !src.active
-	investigate_log("turned [active?"<font color='red'>ON</font>":"<font color='green'>OFF</font>"] by [usr ? usr.key : "outside forces"]","singulo")
-	message_admins("PA Control Computer turned [active ?"ON":"OFF"] by [key_name(usr, usr.client)](<A HREF='?_src_=holder;adminmoreinfo=\ref[usr]'>?</A>) in ([x],[y],[z] - <A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[x];Y=[y];Z=[z]'>JMP</a>)",0,1)
-	log_game("PA Control Computer turned [active ?"ON":"OFF"] by [usr.ckey]([usr]) in ([x],[y],[z])",ckey=key_name(usr))
+	investigate_log("turned [active?"<font color='red'>ON</font>":"<font color='green'>OFF</font>"] by [user ? user.key : "outside forces"]","singulo")
+	message_admins("PA Control Computer turned [active ?"ON":"OFF"] by [key_name(user, TRUE, highlight_special = TRUE)] in ([x],[y],[z] - <A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[x];Y=[y];Z=[z]'>JMP</a>)",0,1)
+	log_game("PA Control Computer turned [active ?"ON":"OFF"] by [key_name(user)] in ([x],[y],[z])",ckey=key_name(user))
 	if(src.active)
 		update_use_power(2)
 		for(var/obj/structure/particle_accelerator/part in connected_parts)
diff --git a/code/modules/projectiles/targeting/targeting_triggers.dm b/code/modules/projectiles/targeting/targeting_triggers.dm
index 8435dc6d0a5..4c165ea658e 100644
--- a/code/modules/projectiles/targeting/targeting_triggers.dm
+++ b/code/modules/projectiles/targeting/targeting_triggers.dm
@@ -10,7 +10,7 @@
 
 /obj/aiming_overlay/proc/trigger(var/perm)
 
-	if((user.client.prefs.toggles_secondary & SAFETY_CHECK) && user.a_intent != I_HURT) //Check this first to save time.
+	if(user && user.client && (user.client.prefs.toggles_secondary & SAFETY_CHECK) && user.a_intent != I_HURT) //Check this first to save time.
 		user << "You refrain from firing, as you aren't on harm intent."
 		return
 	if(!owner || !aiming_with || !aiming_at || !locked)
diff --git a/code/modules/reagents/reagent_containers/food/snacks.dm b/code/modules/reagents/reagent_containers/food/snacks.dm
index 9e78dca6812..290fdda4810 100644
--- a/code/modules/reagents/reagent_containers/food/snacks.dm
+++ b/code/modules/reagents/reagent_containers/food/snacks.dm
@@ -33,17 +33,16 @@
 		reagents.add_reagent("nutriment",nutriment_amt,nutriment_desc)
 
 /obj/item/weapon/reagent_containers/food/snacks/proc/On_Consume(var/mob/M)
-	if(!usr) usr = M
 	if(!reagents.total_volume)
 		M.visible_message("<span class='notice'>[M] finishes eating \the [src].</span>","<span class='notice'>You finish eating \the [src].</span>")
-		usr.drop_from_inventory(src)	//so icons update :[
+		M.drop_from_inventory(src)	//so icons update :[
 
 		if(trash)
 			if(ispath(trash,/obj/item))
-				var/obj/item/TrashItem = new trash(usr)
-				usr.put_in_hands(TrashItem)
+				var/obj/item/TrashItem = new trash(M)
+				M.put_in_hands(TrashItem)
 			else if(istype(trash,/obj/item))
-				usr.put_in_hands(trash)
+				M.put_in_hands(trash)
 		qdel(src)
 	return
 
@@ -390,7 +389,9 @@
 		if(!src && !user.client)
 			user.custom_emote(1,"[pick("burps", "cries for more", "burps twice", "looks at the area where the food was")]")
 			qdel(src)
-	On_Consume(user)
+
+	if (reagents)
+		On_Consume(user)
 
 //////////////////////////////////////////////////
 ////////////////////////////////////////////Snacks
@@ -4874,4 +4875,4 @@
 	bitesize = 5
 	center_of_mass = list("x"=16, "y"=16)
 	nutriment_desc = list("regret" = 6)
-	nutriment_amt = 6
\ No newline at end of file
+	nutriment_amt = 6
diff --git a/code/modules/reagents/reagent_dispenser.dm b/code/modules/reagents/reagent_dispenser.dm
index 6d1c46d9fb2..6d1df1fe9f0 100644
--- a/code/modules/reagents/reagent_dispenser.dm
+++ b/code/modules/reagents/reagent_dispenser.dm
@@ -166,6 +166,9 @@
 	explode()
 
 /obj/structure/reagent_dispensers/fueltank/proc/explode()
+	if (QDELETED(src))
+		return
+
 	if (reagents.total_volume > 500)
 		explosion(src.loc,1,2,4)
 	else if (reagents.total_volume > 100)
diff --git a/code/modules/shieldgen/sheldwallgen.dm b/code/modules/shieldgen/sheldwallgen.dm
index d5f2cb7731a..1f09d92ca4f 100644
--- a/code/modules/shieldgen/sheldwallgen.dm
+++ b/code/modules/shieldgen/sheldwallgen.dm
@@ -58,6 +58,9 @@
 		power = 0
 		return 0
 	var/turf/T = src.loc
+	if (!istype(T))
+		power = 0
+		return 0
 
 	var/obj/structure/cable/C = T.get_cable_node()
 	var/datum/powernet/PN
@@ -106,7 +109,7 @@
 				"You hear heavy droning fade out")
 			icon_state = "Shield_Gen"
 			src.active = 0
-			for(var/dir in list(1,2,4,8)) 
+			for(var/dir in list(1,2,4,8))
 				cleanup(dir)
 
 /obj/machinery/shieldwallgen/proc/setup_field(var/NSEW = 0)
diff --git a/code/modules/shieldgen/shield_capacitor.dm b/code/modules/shieldgen/shield_capacitor.dm
index bde7ecd1e64..76bb28e1df0 100644
--- a/code/modules/shieldgen/shield_capacitor.dm
+++ b/code/modules/shieldgen/shield_capacitor.dm
@@ -28,7 +28,7 @@
 		if(get_dir(src, possible_gen) == src.dir)
 			possible_gen.owned_capacitor = src
 			break
-	
+
 /obj/machinery/shield_capacitor/emag_act(var/remaining_charges, var/mob/user)
 	if(prob(75))
 		src.locked = !src.locked
@@ -106,7 +106,13 @@
 	//see if we can connect to a power net.
 	var/datum/powernet/PN
 	var/turf/T = src.loc
+
+	if (!istype(T))
+		active = 0
+		return
+
 	var/obj/structure/cable/C = T.get_cable_node()
+
 	if (C)
 		PN = C.powernet