From 35e0027328718fbd0b94f0ca5ecdd8da2e727715 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Wed, 15 Apr 2015 19:43:32 +0300
Subject: [PATCH] Prevent out-of-bounds coords when closing a door

---
 src/lock.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/lock.c b/src/lock.c
index c29be8549..26abde26a 100644
--- a/src/lock.c
+++ b/src/lock.c
@@ -692,6 +692,8 @@ doclose()		/* try to close a door */
 		return(1);
 	}
 
+	if (!isok(x,y)) goto nodoor;
+
 	if ((mtmp = m_at(x,y))				&&
 		mtmp->m_ap_type == M_AP_FURNITURE	&&
 		(mtmp->mappearance == S_hcdoor ||
@@ -723,8 +725,10 @@ doclose()		/* try to close a door */
 		    pline_The("drawbridge is already closed.");
 		else if (portcullis || door->typ == DRAWBRIDGE_DOWN)
 		    There("is no obvious way to close the drawbridge.");
-		else
+		else {
+nodoor:
 		    You("%s no door there.", Blind ? "feel" : "see");
+		}
 		return res;
 	}