From 8a07e2cdc5abb46400e66a4919b61dd9ac04fff2 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Sun, 15 Nov 2015 18:55:09 +0200
Subject: [PATCH] Fix use of data from deleted vault teleport trap

---
 src/teleport.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/teleport.c b/src/teleport.c
index 8f7b5860a..5faf0135c 100644
--- a/src/teleport.c
+++ b/src/teleport.c
@@ -490,12 +490,14 @@ int
 dotele()
 {
     struct trap *trap;
+    boolean trap_once = FALSE;
 
     trap = t_at(u.ux, u.uy);
     if (trap && (!trap->tseen || trap->ttyp != TELEP_TRAP))
         trap = 0;
 
     if (trap) {
+        trap_once = trap->once; /* trap may get deleted, save this */
         if (trap->once) {
             pline("This is a vault teleport, usable once only.");
             if (yn("Jump in?") == 'n')
@@ -569,7 +571,7 @@ dotele()
     }
 
     if (next_to_u()) {
-        if (trap && trap->once)
+        if (trap && trap_once)
             vault_tele();
         else
             tele();