diff --git a/code/controllers/configuration/configuration.dm b/code/controllers/configuration/configuration.dm
index ff1cd67bed88..c85a03c950e2 100644
--- a/code/controllers/configuration/configuration.dm
+++ b/code/controllers/configuration/configuration.dm
@@ -196,6 +196,8 @@
 	var/entry_is_abstract = initial(E.abstract_type) == entry_type
 	if(entry_is_abstract)
 		CRASH("Tried to retrieve an abstract config_entry: [entry_type]")
+	if(!islist(entries_by_type))
+		CRASH("entries_by_type is not a list when trying to get: [entry_type]")
 	E = entries_by_type[entry_type]
 	if(!E)
 		CRASH("Missing config entry for [entry_type]!")
diff --git a/code/datums/components/religious_tool.dm b/code/datums/components/religious_tool.dm
index 416129c12e39..cc29c1a8d1ad 100644
--- a/code/datums/components/religious_tool.dm
+++ b/code/datums/components/religious_tool.dm
@@ -96,6 +96,9 @@
 			return
 		var/selection2type = easy_access_sect.rites_list[rite_select]
 		performing_rite = new selection2type(parent)
+		if(!performing_rite)
+			to_chat(user, span_warning("Type [rite_select] is not a valid rite! Please make a bug report!"))
+			return
 		if(!performing_rite.perform_rite(user, parent))
 			QDEL_NULL(performing_rite)
 		else
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index 02825d43a730..53d5da492356 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -2121,7 +2121,7 @@ GLOBAL_LIST_EMPTY(mentor_races)
 	if(H.IsParalyzed() || H.IsStun())
 		return FALSE
 	var/obj/item/organ/tail = H.getorganslot(ORGAN_SLOT_TAIL)
-	return tail.get_availability(H.dna.species)
+	return tail?.get_availability(H.dna.species)
 
 /datum/species/proc/is_wagging_tail(mob/living/carbon/human/H)
 	return ("waggingtail_human" in mutant_bodyparts) || ("waggingtail_lizard" in mutant_bodyparts)
diff --git a/code/modules/modular_computers/file_system/programs/medical/chem_scan.dm b/code/modules/modular_computers/file_system/programs/medical/chem_scan.dm
index d3639e991bc6..9230f629f095 100644
--- a/code/modules/modular_computers/file_system/programs/medical/chem_scan.dm
+++ b/code/modules/modular_computers/file_system/programs/medical/chem_scan.dm
@@ -46,6 +46,7 @@
 	if(lastscan.len)
 		data["chems"] = lastscan["reagents"]["reagentlist"]
 	else
+		lastscan["reagents"] = list()
 		data["chems"] = lastscan["reagents"]["reagentlist"] = list()
 	return data
 
diff --git a/code/modules/research/nanites/nanite_programs/healing.dm b/code/modules/research/nanites/nanite_programs/healing.dm
index 837d999a22cd..df87a61987f5 100644
--- a/code/modules/research/nanites/nanite_programs/healing.dm
+++ b/code/modules/research/nanites/nanite_programs/healing.dm
@@ -149,7 +149,7 @@
 
 /datum/nanite_program/purging_advanced/check_conditions()
 	var/foreign_reagent = FALSE
-	for(var/datum/reagent/toxin/R in host_mob.reagents.reagent_list)
+	for(var/datum/reagent/toxin/R in host_mob.reagents?.reagent_list)
 		foreign_reagent = TRUE
 		break
 	if(!host_mob.getToxLoss() && !foreign_reagent)
@@ -158,7 +158,7 @@
 
 /datum/nanite_program/purging_advanced/active_effect()
 	host_mob.adjustToxLoss(-1)
-	for(var/datum/reagent/toxin/R in host_mob.reagents.reagent_list)
+	for(var/datum/reagent/toxin/R in host_mob.reagents?.reagent_list)
 		host_mob.reagents.remove_reagent(R.type,1)
 
 /datum/nanite_program/regenerative_advanced
diff --git a/yogstation/code/modules/admin/verbs/adminhelp.dm b/yogstation/code/modules/admin/verbs/adminhelp.dm
index 15367cf94caa..255c4f86782a 100644
--- a/yogstation/code/modules/admin/verbs/adminhelp.dm
+++ b/yogstation/code/modules/admin/verbs/adminhelp.dm
@@ -934,6 +934,8 @@ GLOBAL_DATUM_INIT(ahelp_tickets, /datum/admin_help_tickets, new)
 
 /proc/get_admin_counts(requiredflags = R_BAN)
 	. = list("total" = list(), "noflags" = list(), "afk" = list(), "stealth" = list(), "present" = list())
+	if(!GLOB.permissions)
+		CRASH("Tried to fetch admin counts when permissions were not initialized")
 	for(var/client/X in GLOB.permissions.admins)
 		.["total"] += X
 		if(requiredflags != 0 && !check_rights_for(X, requiredflags))