From f68d90accbb252306bcef62645f78afa0dfc4798 Mon Sep 17 00:00:00 2001
From: Blue Shadow <blueshadow_941@yahoo.com>
Date: Mon, 8 Jan 2018 19:04:18 +0300
Subject: [PATCH] Fixed a case of infinite loop in A_BrainDie

---
 wadsrc/static/zscript/doom/bossbrain.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wadsrc/static/zscript/doom/bossbrain.txt b/wadsrc/static/zscript/doom/bossbrain.txt
index fadc280e3d..163683f277 100644
--- a/wadsrc/static/zscript/doom/bossbrain.txt
+++ b/wadsrc/static/zscript/doom/bossbrain.txt
@@ -205,7 +205,11 @@ extend class Actor
 					if (mo.health > 0 && mo.bBossSpawned)
 					{
 						mo.DamageMobj(self, self, mo.health, "None", DMG_NO_ARMOR|DMG_FORCED|DMG_THRUSTLESS|DMG_NO_FACTOR);
-						count++;
+
+						// [Blue Shadow] If 'mo' is a RandomSpawner or another actor which can't be killed,
+						// it could cause this code to loop indefinitely. So only let it trigger a loop if it
+						// has been actually killed.
+						if (mo.bKilled) count++;
 					}
 				}
 			} while (count != 0);