Of runtimes and null.

code/modules/clothing/shoes/magboots.dm

@@ -56,7 +56,10 @@
 /obj/item/clothing/shoes/magboots/advance/debug
 
 /obj/item/clothing/shoes/magboots/advance/debug/Initialize()
-	attack_self(src)
+	. = ..()
+	var/mob/living/L = loc
+	if(istype(L))
+		attack_self(L)
 
 /obj/item/clothing/shoes/magboots/paramedic
 	desc = "A pair of magboots decked in colors matching the equipment of an emergency medical technician."

code/modules/mob/living/silicon/pai/pai.dm

@@ -302,11 +302,11 @@
 /obj/item/paicard/attackby(obj/item/W, mob/user, params)
 	..()
 	user.set_machine(src)
-	if(pai.encryptmod == TRUE)
-		if(W.tool_behaviour == TOOL_SCREWDRIVER)
-			pai.radio.attackby(W, user, params)
-		else if(istype(W, /obj/item/encryptionkey))
-			pai.radio.attackby(W, user, params)
+	var/encryption_key_stuff = W.tool_behaviour == TOOL_SCREWDRIVER || istype(W, /obj/item/encryptionkey)
+	if(!encryption_key_stuff)
+		return
+	if(pai?.encryptmod)
+		pai.radio.attackby(W, user, params)
 	else
 		to_chat(user, "Encryption Key ports not configured.")
 

code/modules/vore/eating/living.dm

@@ -158,7 +158,7 @@
 		swallow_time = istype(prey, /mob/living/carbon/human) ? belly.human_prey_swallow_time : belly.nonhuman_prey_swallow_time
 
 	//Timer and progress bar
-	if(!do_after(user, swallow_time, prey))
+	if(!do_after(user, swallow_time, TRUE, prey))
 		return FALSE // Prey escaped (or user disabled) before timer expired.
 
 	if(!prey.Adjacent(user)) //double check'd just in case they moved during the timer and the do_mob didn't fail for whatever reason