From 70795fa1242275351622872a5c61b4534ac4d639 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Thu, 3 Mar 2022 22:23:25 +0200
Subject: [PATCH] Prevent monster hurtling outside map

---
 src/dothrow.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/dothrow.c b/src/dothrow.c
index 3eb5374ac..7d56dfef4 100644
--- a/src/dothrow.c
+++ b/src/dothrow.c
@@ -910,6 +910,9 @@ mhurtle_step(genericptr_t arg, int x, int y)
     /* TODO: Treat walls, doors, iron bars, etc. specially
      * rather than just stopping before.
      */
+    if (!isok(x, y))
+        return FALSE;
+
     if (goodpos(x, y, mon, MM_IGNOREWATER | MM_IGNORELAVA)
         && m_in_out_region(mon, x, y)) {
         int res;