More stuff.

code/game/turfs/turf.dm

@@ -554,6 +554,8 @@
 	//if the vomit combined, apply toxicity and reagents to the old vomit
 	if (QDELETED(V))
 		V = locate() in src
+	if(!V) //the decal was spawned on a wall or groundless turf and promptly qdeleted.
+		return
 	// Make toxins and blazaam vomit look different
 	if(toxvomit == VOMIT_PURPLE)
 		V.icon_state = "vomitpurp_[pick(1,4)]"

code/modules/reagents/chemistry/reagents/toxin_reagents.dm

@@ -504,7 +504,7 @@
 	toxpwr = 0
 
 /datum/reagent/toxin/itching_powder/reaction_mob(mob/living/M, method=TOUCH, reac_volume)
-	if(method == TOUCH || method == VAPOR)
+	if((method == TOUCH || method == VAPOR) && M.reagents)
 		M.reagents.add_reagent(/datum/reagent/toxin/itching_powder, reac_volume)
 
 /datum/reagent/toxin/itching_powder/on_mob_life(mob/living/carbon/M)