From 7d1e2d738e17aada6ad5717ba054afe7a9a412e2 Mon Sep 17 00:00:00 2001
From: obligaron <obligaron@live.com>
Date: Sun, 3 Apr 2022 10:27:08 +0200
Subject: [PATCH] Ensure Reflect + Thorn don't kill a monster twice (#4318)

---
 Source/monster.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/monster.cpp b/Source/monster.cpp
index 0baa1b79a..27729c5a3 100644
--- a/Source/monster.cpp
+++ b/Source/monster.cpp
@@ -1414,7 +1414,8 @@ void MonsterAttackPlayer(int i, int pnum, int hit, int minDam, int maxDam)
 			CheckReflect(i, pnum, dam);
 		ApplyPlrDamage(pnum, 0, 0, dam);
 	}
-	if ((player._pIFlags & ISPL_THORNS) != 0) {
+	// Reflect can also kill a monster, so make sure the monster is still alive
+	if ((player._pIFlags & ISPL_THORNS) != 0 && monster._mmode != MonsterMode::Death) {
 		int mdam = (GenerateRnd(3) + 1) << 6;
 		monster._mhitpoints -= mdam;
 		if (monster._mhitpoints >> 6 <= 0)