Improves the way chem machines handle qdel, fixes some runtimes (#33415)

code/modules/reagents/chemistry/machinery/chem_dispenser.dm

@@ -59,6 +59,11 @@
 	recharge()
 	dispensable_reagents = sortList(dispensable_reagents)
 
+/obj/machinery/chem_dispenser/Destroy()
+	QDEL_NULL(beaker)
+	QDEL_NULL(cell)
+	return ..()
+
 /obj/machinery/chem_dispenser/process()
 
 	if(recharged < 0)
@@ -303,6 +308,7 @@
 	if(beaker)
 		beaker.forceMove(drop_location())
 		beaker = null
+	return ..()
 
 /obj/machinery/chem_dispenser/drinks
 	name = "soda dispenser"

code/modules/reagents/chemistry/machinery/chem_heater.dm

@@ -13,6 +13,28 @@
 	var/heater_coefficient = 0.1
 	var/on = FALSE
 
+/obj/machinery/chem_heater/Destroy()
+	QDEL_NULL(beaker)
+	return ..()
+
+/obj/machinery/chem_heater/handle_atom_del(atom/A)
+	. = ..()
+	if(A == beaker)
+		beaker = null
+		update_icon()
+
+/obj/machinery/chem_heater/update_icon()
+	if(beaker)
+		icon_state = "mixer1b"
+	else
+		icon_state = "mixer0b"
+
+/obj/machinery/chem_heater/proc/eject_beaker()
+	if(beaker)
+		beaker.forceMove(drop_location())
+		beaker = null
+		update_icon()
+
 /obj/machinery/chem_heater/RefreshParts()
 	heater_coefficient = 0.1
 	for(var/obj/item/stock_parts/micro_laser/M in component_parts)
@@ -52,12 +74,13 @@
 			return
 		beaker = I
 		to_chat(user, "<span class='notice'>You add [I] to [src].</span>")
-		icon_state = "mixer1b"
+		update_icon()
 		return
 	return ..()
 
 /obj/machinery/chem_heater/on_deconstruction()
 	eject_beaker()
+	return ..()
 
 /obj/machinery/chem_heater/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = FALSE, \
 										datum/tgui/master_ui = null, datum/ui_state/state = GLOB.default_state)
@@ -108,10 +131,3 @@
 			on = FALSE
 			eject_beaker()
 			. = TRUE
-
-/obj/machinery/chem_heater/proc/eject_beaker()
-	if(beaker)
-		beaker.forceMove(drop_location())
-		beaker.reagents.handle_reactions()
-		beaker = null
-		icon_state = "mixer0b"

code/modules/reagents/chemistry/machinery/chem_master.dm

@@ -13,7 +13,7 @@
 	var/obj/item/reagent_containers/beaker = null
 	var/obj/item/storage/pill_bottle/bottle = null
 	var/mode = 1
-	var/condi = 0
+	var/condi = FALSE
 	var/screen = "home"
 	var/analyzeVars[0]
 	var/useramount = 30 // Last used amount
@@ -23,6 +23,11 @@
 	add_overlay("waitlight")
 	. = ..()
 
+/obj/machinery/chem_master/Destroy()
+	QDEL_NULL(beaker)
+	QDEL_NULL(bottle)
+	return ..()
+
 /obj/machinery/chem_master/RefreshParts()
 	reagents.maximum_volume = 0
 	for(var/obj/item/reagent_containers/glass/beaker/B in component_parts)
@@ -44,10 +49,22 @@
 	if(A == beaker)
 		beaker = null
 		reagents.clear_reagents()
-		icon_state = "mixer0"
+		update_icon()
 	else if(A == bottle)
 		bottle = null
 
+/obj/machinery/chem_master/update_icon()
+	if(beaker)
+		icon_state = "mixer1"
+	else
+		icon_state = "mixer0"
+
+/obj/machinery/chem_master/proc/eject_beaker()
+	if(beaker)
+		beaker.forceMove(drop_location())
+		adjust_item_drop_location(beaker)
+		beaker = null
+		update_icon()
 
 /obj/machinery/chem_master/blob_act(obj/structure/blob/B)
 	if (prob(50))
@@ -61,15 +78,6 @@
 
 /obj/machinery/chem_master/attackby(obj/item/I, mob/user, params)
 	if(default_deconstruction_screwdriver(user, "mixer0_nopower", "mixer0", I))
-		if(beaker)
-			beaker.forceMove(drop_location())
-			adjust_item_drop_location(beaker)
-			beaker = null
-			reagents.clear_reagents()
-		if(bottle)
-			bottle.forceMove(drop_location())
-			adjust_item_drop_location(bottle)
-			bottle = null
 		return
 
 	else if(exchange_parts(user, I))
@@ -94,7 +102,7 @@
 		beaker = I
 		to_chat(user, "<span class='notice'>You add [I] to [src].</span>")
 		src.updateUsrDialog()
-		icon_state = "mixer1"
+		update_icon()
 
 	else if(!condi && istype(I, /obj/item/storage/pill_bottle))
 		if(bottle)
@@ -109,6 +117,13 @@
 	else
 		return ..()
 
+/obj/machinery/chem_master/on_deconstruction()
+	eject_beaker()
+	if(bottle)
+		bottle.forceMove(drop_location())
+		adjust_item_drop_location(bottle)
+		bottle = null
+	return ..()
 
 /obj/machinery/chem_master/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = FALSE, \
 										datum/tgui/master_ui = null, datum/ui_state/state = GLOB.default_state)
@@ -154,13 +169,8 @@
 		return
 	switch(action)
 		if("eject")
-			if(beaker)
-				beaker.forceMove(drop_location())
-				adjust_item_drop_location(beaker)
-				beaker = null
-				reagents.clear_reagents()
-				icon_state = "mixer0"
-				. = TRUE
+			eject_beaker()
+			. = TRUE
 
 		if("ejectp")
 			if(bottle)
@@ -348,7 +358,7 @@
 			#if DM_VERSION >= 513
 			#warning 512 is definitely stable now, remove the old code
 			#endif
-			
+
 			#if DM_VERSION >= 512
 			. += hex2num(md5[i])
 			#else
@@ -361,4 +371,4 @@
 /obj/machinery/chem_master/condimaster
 	name = "CondiMaster 3000"
 	desc = "Used to create condiments and other cooking supplies."
-	condi = 1
+	condi = TRUE

code/modules/reagents/chemistry/machinery/pandemic.dm

@@ -25,6 +25,12 @@
 	QDEL_NULL(beaker)
 	return ..()
 
+/obj/machinery/computer/pandemic/handle_atom_del(atom/A)
+	. = ..()
+	if(A == beaker)
+		beaker = null
+		update_icon()
+
 /obj/machinery/computer/pandemic/proc/get_by_index(thing, index)
 	if(!beaker || !beaker.reagents)
 		return
@@ -121,9 +127,10 @@
 		add_overlay("waitlight")
 
 /obj/machinery/computer/pandemic/proc/eject_beaker()
-	beaker.forceMove(drop_location())
-	beaker = null
-	update_icon()
+	if(beaker)
+		beaker.forceMove(drop_location())
+		beaker = null
+		update_icon()
 
 /obj/machinery/computer/pandemic/ui_interact(mob/user, ui_key = "main", datum/tgui/ui, force_open = FALSE, datum/tgui/master_ui, datum/ui_state/state = GLOB.default_state)
 	ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
@@ -159,8 +166,7 @@
 		return
 	switch(action)
 		if("eject_beaker")
-			if(beaker)
-				eject_beaker()
+			eject_beaker()
 			. = TRUE
 		if("empty_beaker")
 			if(beaker)
@@ -236,7 +242,5 @@
 		return ..()
 
 /obj/machinery/computer/pandemic/on_deconstruction()
-	if(beaker)
-		beaker.forceMove(drop_location())
-		beaker = null
+	eject_beaker()
 	. = ..()