bugfix: Runtimes & Possible log viewer fix (#6663)

* bugfix: Runtimes & Possible log viewer fix

* Update level_traits.dm

Author: BeebBeebBoob

code/__HELPERS/level_traits.dm

@@ -91,6 +91,8 @@ GLOBAL_LIST_INIT(default_map_traits, MAP_TRANSITION_CONFIG)
 /proc/are_zs_connected(atom/A, atom/B)
 	A = get_turf(A)
 	B = get_turf(B)
+	if(isnull(A) || isnull(B))
+		return FALSE
 	if(A.z == B.z)
 		return TRUE
 	return (B.z in SSmapping.get_connected_levels(A))

code/_onclick/hud/parallax.dm

@@ -376,7 +376,8 @@ INITIALIZE_IMMEDIATE(/atom/movable/screen/parallax_layer)
 /atom/movable/screen/parallax_layer/planet/proc/on_mob_logout(mob/source)
 	SIGNAL_HANDLER
 	var/client/boss = source.canon_client
-	update_status(boss.mob)
+	if(boss) // this is stupid. I don't know why, but in rare cases it runtimes. Perhaps client's deletes before we can check all procs on him
+		update_status(boss.mob)
 
 /atom/movable/screen/parallax_layer/planet/proc/on_z_change(mob/source)
 	SIGNAL_HANDLER
@@ -386,7 +387,7 @@ INITIALIZE_IMMEDIATE(/atom/movable/screen/parallax_layer)
 
 /atom/movable/screen/parallax_layer/planet/update_status(mob/M)
 	var/turf/T = get_turf(M)
-	if(is_station_level(T.z))
+	if(is_station_level(T?.z))
 		invisibility = 0
 	else
 		invisibility = INVISIBILITY_ABSTRACT

code/modules/mob/holder.dm

@@ -81,7 +81,9 @@
 
 /mob/living/simple_animal/MouseDrop(atom/over_object)
 	var/mob/living/carbon/human/human_to_ask = over_object //changed to human to avoid stupid issues like xenos holding animals.
-	if(!istype(human_to_ask) || human_to_ask.incapacitated() || HAS_TRAIT(human_to_ask, TRAIT_HANDS_BLOCKED) || !Adjacent(human_to_ask) || !holder_type)
+	if(!istype(human_to_ask))
+		return ..()
+	if(human_to_ask.incapacitated() || HAS_TRAIT(human_to_ask, TRAIT_HANDS_BLOCKED) || !Adjacent(human_to_ask) || !holder_type)
 		return ..()
 	if(usr == src)
 		switch(alert(human_to_ask, "[src] wants you to pick [p_them()] up. Do it?",,"Yes","No"))

code/modules/ruins/lavalandruin_code/puzzle.dm

@@ -240,7 +240,7 @@
 
 /obj/structure/puzzle_element/Moved(atom/old_loc, movement_dir, forced, list/old_locs, momentum_change = TRUE)
 	. = ..()
-	source.validate()
+	source?.validate()
 
 //Admin abuse version so you can pick the icon before it sets up
 /obj/effect/sliding_puzzle/admin