diff --git a/code/WorkInProgress/mining.dm b/code/WorkInProgress/mining.dm
index 6945b201d44..b0909133880 100644
--- a/code/WorkInProgress/mining.dm
+++ b/code/WorkInProgress/mining.dm
@@ -2528,6 +2528,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	perunit = 2000
 
 /obj/item/stack/sheet/gold/New()
+	..()
 	pixel_x = rand(0,4)-4
 	pixel_y = rand(0,4)-4
 
@@ -2543,6 +2544,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	perunit = 2000
 
 /obj/item/stack/sheet/silver/New()
+	..()
 	pixel_x = rand(0,4)-4
 	pixel_y = rand(0,4)-4
 
@@ -2557,6 +2559,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	perunit = 1000
 
 /obj/item/stack/sheet/diamond/New()
+	..()
 	pixel_x = rand(0,4)-4
 	pixel_y = rand(0,4)-4
 
@@ -2605,6 +2608,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	perunit = 2000
 
 /obj/item/stack/sheet/clown/New()
+	..()
 	pixel_x = rand(0,4)-4
 	pixel_y = rand(0,4)-4
 
diff --git a/code/defines/obj/toy.dm b/code/defines/obj/toy.dm
index e1ea24fd610..c4503481efc 100644
--- a/code/defines/obj/toy.dm
+++ b/code/defines/obj/toy.dm
@@ -183,8 +183,9 @@ obj/item/toy/blink
 				sleep(1)
 
 			spawn(10)
-				new /obj/item/toy/ammo/crossbow(D.loc)
-				del(D)
+				if(D)
+					new /obj/item/toy/ammo/crossbow(D.loc)
+					del(D)
 
 			return
 		else if (bullets == 0)
diff --git a/code/defines/procs/helpers.dm b/code/defines/procs/helpers.dm
index a0b230c53e4..4d777fa8e8c 100644
--- a/code/defines/procs/helpers.dm
+++ b/code/defines/procs/helpers.dm
@@ -743,7 +743,7 @@
 // Otherwise, the user mob's machine var will be reset directly.
 //
 /proc/onclose(mob/user, windowid, var/atom/ref=null)
-
+	if(!user.client) return
 	var/param = "null"
 	if(ref)
 		param = "\ref[ref]"
diff --git a/code/game/gamemodes/wizard/spells.dm b/code/game/gamemodes/wizard/spells.dm
index c0c08b06a58..f52c976a1be 100644
--- a/code/game/gamemodes/wizard/spells.dm
+++ b/code/game/gamemodes/wizard/spells.dm
@@ -485,8 +485,10 @@
 					break
 			if(clear)
 				L+=T
-
-	usr.loc = pick(L)
+	if(L.len)
+		usr.loc = pick(L)
+	else
+		usr <<"The spell matrix was unable to locate a suitable teleport destination for an unknown reason. Sorry."
 
 	smoke.start()
 
diff --git a/code/game/machinery/computer/buildandrepair.dm b/code/game/machinery/computer/buildandrepair.dm
index a8fec98642d..31f3fabf54c 100644
--- a/code/game/machinery/computer/buildandrepair.dm
+++ b/code/game/machinery/computer/buildandrepair.dm
@@ -183,11 +183,12 @@
 				if(P:amount >= 5)
 					playsound(src.loc, 'Deconstruct.ogg', 50, 1)
 					if(do_after(user, 20))
-						P:amount -= 5
-						if(!P:amount) del(P)
-						user << "\blue You add cables to the frame."
-						src.state = 3
-						src.icon_state = "3"
+						if(P)
+							P:amount -= 5
+							if(!P:amount) del(P)
+							user << "\blue You add cables to the frame."
+							src.state = 3
+							src.icon_state = "3"
 		if(3)
 			if(istype(P, /obj/item/weapon/wirecutters))
 				playsound(src.loc, 'wirecutter.ogg', 50, 1)
@@ -201,10 +202,11 @@
 				if(P:amount >= 2)
 					playsound(src.loc, 'Deconstruct.ogg', 50, 1)
 					if(do_after(user, 20))
-						P:use(2)
-						user << "\blue You put in the glass panel."
-						src.state = 4
-						src.icon_state = "4"
+						if(P)
+							P:use(2)
+							user << "\blue You put in the glass panel."
+							src.state = 4
+							src.icon_state = "4"
 		if(4)
 			if(istype(P, /obj/item/weapon/crowbar))
 				playsound(src.loc, 'Crowbar.ogg', 50, 1)
diff --git a/code/game/objects/stacks/metal.dm b/code/game/objects/stacks/metal.dm
index 430ad58e2f8..8108e8ab850 100644
--- a/code/game/objects/stacks/metal.dm
+++ b/code/game/objects/stacks/metal.dm
@@ -102,7 +102,8 @@ var/global/list/datum/stack_recipe/r_metal_recipes = list ( \
 
 // TILES
 
-/obj/item/stack/tile/New()
+/obj/item/stack/tile/New(var/loc, var/amount=null)
+	..()
 	src.pixel_x = rand(1, 14)
 	src.pixel_y = rand(1, 14)
 	return
diff --git a/code/game/research/rdconsole.dm b/code/game/research/rdconsole.dm
index 0bd5fbd18cb..1c0ce9636f5 100644
--- a/code/game/research/rdconsole.dm
+++ b/code/game/research/rdconsole.dm
@@ -258,6 +258,9 @@ won't update every console in existence) but it's more of a hassle to do. Also,
 					spawn(24)
 						linked_destroy.busy = 0
 						if(!linked_destroy.hacked)
+							if(!linked_destroy.loaded_item)
+								usr <<"\red The destructive analyzer appears to be empty."
+								return
 							if(linked_destroy.loaded_item.reliability >= 90)
 								var/list/temp_tech = linked_destroy.ConvertReqString2List(linked_destroy.loaded_item.origin_tech)
 								for(var/T in temp_tech)
diff --git a/code/modules/mob/living/carbon/alien/humanoid/life_new.dm b/code/modules/mob/living/carbon/alien/humanoid/life_new.dm
index 3df38a5f830..f4994a26b58 100644
--- a/code/modules/mob/living/carbon/alien/humanoid/life_new.dm
+++ b/code/modules/mob/living/carbon/alien/humanoid/life_new.dm
@@ -164,8 +164,8 @@
 
 
 		breathe()
-
-			if(src.reagents.has_reagent("lexorin")) return
+			if(src.reagents)
+				if(src.reagents.has_reagent("lexorin")) return
 			if(istype(loc, /obj/machinery/atmospherics/unary/cryo_cell)) return
 
 			var/datum/gas_mixture/environment = loc.return_air()