Fix a number of reported runtimes

_maps/layeniastation.json

@@ -12,7 +12,7 @@
 	"traits": [
 		{
 			"Up": 1,
-			"Baseturf": "/area/space",
+			"Baseturf": "/turf/space",
 			"Linkage": "Cross"
 		},
 		{

code/datums/elements/photosynthesis.dm

@@ -49,8 +49,9 @@
 	return ..()
 
 /datum/element/photosynthesis/process()
-	for(var/A in attached_atoms)
-		var/atom/movable/AM = A
+	for(var/atom/movable/AM as anything in attached_atoms)
+		if(isnull(AM))
+			continue
 		var/light_amount = 0 //how much light there is in the place, affects receiving nutrition and healing
 		if(isturf(AM.loc)) //else, there's considered to be no light
 			var/turf/T = AM.loc

code/modules/mob/living/carbon/carbon.dm

@@ -103,7 +103,7 @@
 	. = ..()
 	var/hurt = TRUE
 	var/extra_speed = 0
-	if(throwingdatum.thrower != src)
+	if(throwingdatum?.thrower != src)
 		extra_speed = min(max(0, throwingdatum.speed - initial(throw_speed)), 3)
 	if(GetComponent(/datum/component/tackler))
 		return

code/modules/recycling/disposal/holder.dm

@@ -22,7 +22,8 @@
 
 // initialize a holder from the contents of a disposal unit
 /obj/structure/disposalholder/proc/init(obj/machinery/disposal/D)
-	gas = D.air_contents// transfer gas resv. into holder object
+	if(istype(D)) // This is sometimes called on non-machinery disposals system types.
+		gas = D.air_contents// transfer gas resv. into holder object
 
 	//Check for any living mobs trigger hasmob.
 	//hasmob effects whether the package goes to cargo or its tagged destination.

code/modules/surgery/bodyparts/_bodyparts.dm

@@ -636,7 +636,6 @@
 /obj/item/bodypart/proc/update_limb(dropping_limb, mob/living/carbon/source)
 	body_markings_list = list()
 	var/mob/living/carbon/C
-	owner.create_weakref()
 	if(source)
 		C = source
 		if(!original_owner)