From 0aa2e6b6a209c42f8026bddecc1af25b482e93b6 Mon Sep 17 00:00:00 2001
From: kevinz000 <kevinz1234567890@gmail.com>
Date: Thu, 19 Oct 2017 00:00:16 -0700
Subject: [PATCH 1/2] Adds type checks to HUD alert clicks to prevent ghosts
 from causing runtimes (#31609)

* Update alert.dm

* better fix
---
 code/_onclick/hud/alert.dm        | 6 +++---
 code/modules/mob/living/living.dm | 2 +-
 code/modules/mob/mob.dm           | 3 +++
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/code/_onclick/hud/alert.dm b/code/_onclick/hud/alert.dm
index 3cc6734482..2d3a3341da 100644
--- a/code/_onclick/hud/alert.dm
+++ b/code/_onclick/hud/alert.dm
@@ -243,7 +243,7 @@ or shoot a gun to move around via Newton's 3rd Law of Motion."
 
 /obj/screen/alert/fire/Click()
 	var/mob/living/L = usr
-	if(!L.can_resist())
+	if(!istype(L) || !L.can_resist())
 		return
 	L.changeNext_move(CLICK_CD_RESIST)
 	if(L.canmove)
@@ -559,7 +559,7 @@ so as to remain in compliance with the most up-to-date laws."
 
 /obj/screen/alert/restrained/Click()
 	var/mob/living/L = usr
-	if(!L.can_resist())
+	if(!istype(L) || !L.can_resist())
 		return
 	L.changeNext_move(CLICK_CD_RESIST)
 	if((L.canmove) && (L.last_special <= world.time))
@@ -567,7 +567,7 @@ so as to remain in compliance with the most up-to-date laws."
 
 /obj/screen/alert/restrained/buckled/Click()
 	var/mob/living/L = usr
-	if(!L.can_resist())
+	if(!istype(L) || !L.can_resist())
 		return
 	L.changeNext_move(CLICK_CD_RESIST)
 	if(L.last_special <= world.time)
diff --git a/code/modules/mob/living/living.dm b/code/modules/mob/living/living.dm
index bbb36edad3..0cfda3821f 100644
--- a/code/modules/mob/living/living.dm
+++ b/code/modules/mob/living/living.dm
@@ -586,7 +586,7 @@
 	if(!force_moving)
 		..(pressure_difference, direction, pressure_resistance_prob_delta)
 
-/mob/living/proc/can_resist()
+/mob/living/can_resist()
 	return !((next_move > world.time) || incapacitated(ignore_restraints = TRUE))
 
 /mob/living/verb/resist()
diff --git a/code/modules/mob/mob.dm b/code/modules/mob/mob.dm
index 02c1fa4b44..657c4f0ded 100644
--- a/code/modules/mob/mob.dm
+++ b/code/modules/mob/mob.dm
@@ -356,6 +356,9 @@
 		else
 			M.LAssailant = usr
 
+/mob/proc/can_resist()
+	return FALSE		//overridden in living.dm
+
 /mob/proc/spin(spintime, speed)
 	set waitfor = 0
 	var/D = dir