Fixes slightly more harddels (#58935)

code/datums/mind.dm

@@ -96,8 +96,8 @@
 
 /datum/mind/Destroy()
 	SSticker.minds -= src
-	if(islist(antag_datums))
-		QDEL_LIST(antag_datums)
+	QDEL_LIST(antag_datums)
+	QDEL_NULL(language_holder)
 	current = null
 	return ..()
 

code/datums/wounds/_wounds.dm

@@ -80,7 +80,7 @@
 
 	/// What kind of scars this wound will create description wise once healed
 	var/scar_keyword = "generic"
-	/// If we've already tried scarring while removing (since remove_wound calls qdel, and qdel calls remove wound, .....) TODO: make this cleaner
+	/// If we've already tried scarring while removing (remove_wound can be called twice in a del chain, let's be nice to our code yeah?) TODO: make this cleaner
 	var/already_scarred = FALSE
 	/// If we forced this wound through badmin smite, we won't count it towards the round totals
 	var/from_smite
@@ -91,8 +91,7 @@
 /datum/wound/Destroy()
 	if(attached_surgery)
 		QDEL_NULL(attached_surgery)
-	if(limb?.wounds && (src in limb.wounds)) // destroy can call remove_wound() and remove_wound() calls qdel, so we check to make sure there's anything to remove first
-		remove_wound()
+	remove_wound()
 	set_limb(null)
 	victim = null
 	return ..()

code/datums/wounds/slash.dm

@@ -35,12 +35,24 @@
 	if(old_wound)
 		blood_flow = max(old_wound.blood_flow, initial_flow)
 		if(old_wound.severity > severity && old_wound.highest_scar)
-			highest_scar = old_wound.highest_scar
-			old_wound.highest_scar = null
+			set_highest_scar(old_wound.highest_scar)
+			old_wound.clear_highest_scar()
 
 	if(!highest_scar)
-		highest_scar = new
-		highest_scar.generate(limb, src, add_to_scars=FALSE)
+		var/datum/scar/new_scar = new
+		set_highest_scar(new_scar)
+		new_scar.generate(limb, src, add_to_scars=FALSE)
+
+/datum/wound/slash/proc/set_highest_scar(datum/scar/new_scar)
+	if(highest_scar)
+		UnregisterSignal(highest_scar, COMSIG_PARENT_QDELETING)
+	if(new_scar)
+		RegisterSignal(new_scar, COMSIG_PARENT_QDELETING, .proc/clear_highest_scar)
+	highest_scar = new_scar
+
+/datum/wound/slash/proc/clear_highest_scar(datum/source)
+	SIGNAL_HANDLER
+	set_highest_scar(null)
 
 /datum/wound/slash/remove_wound(ignore_limb, replaced)
 	if(!replaced && highest_scar)