From 473ae4a6a0d5287499cbbdad6c5ae8c01010fb20 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Tue, 1 Mar 2022 15:31:22 +0200
Subject: [PATCH] Prevent segfault trying to make non-existent trap seen

---
 src/mklev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mklev.c b/src/mklev.c
index 1471013ff..3e387bd96 100644
--- a/src/mklev.c
+++ b/src/mklev.c
@@ -1468,7 +1468,7 @@ mktrap(int num, int mktrapflags, struct mkroom *croom, coord *tm)
 
     if (kind == WEB && !(mktrapflags & MKTRAP_NOSPIDERONWEB))
         (void) makemon(&mons[PM_GIANT_SPIDER], m.x, m.y, NO_MM_FLAGS);
-    if ((mktrapflags & MKTRAP_SEEN))
+    if (t && (mktrapflags & MKTRAP_SEEN))
         t->tseen = TRUE;
 
     /* The hero isn't the only person who's entered the dungeon in