From: nhmall <nhmall@nethack.org>
Date: Wed, 9 Feb 2022 10:47:08 +0000 (-0500)
Subject: don't dereference NULL u.ustuck in dobuzz()
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0e9ecb88fbf883350a9feb3c4c616a2e6282d5e3;p=nethack

don't dereference NULL u.ustuck in dobuzz()
---

diff --git a/doc/fixes3-7-0.txt b/doc/fixes3-7-0.txt
index a81de9e4b..3c1026ccc 100644
--- a/doc/fixes3-7-0.txt
+++ b/doc/fixes3-7-0.txt
@@ -773,6 +773,7 @@ in flush_screen, reorder the code slightly to complete the bot() and
 magic traps can toggle intrinsic invisibility
 Death attacking a monster does drain life attack
 add unique Rider revival messages
+don't dereference NULL u.ustuck in dobuzz() when hero has been swallowed
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository
diff --git a/src/zap.c b/src/zap.c
index e4497f382..d8b4089e2 100644
--- a/src/zap.c
+++ b/src/zap.c
@@ -4252,16 +4252,17 @@ dobuzz(int type, int nd, xchar sx, xchar sy, int dx, int dy,
         if (type < 0)
             return;
         tmp = zhitm(u.ustuck, type, nd, &otmp);
-        if (!u.ustuck)
+        if (!u.ustuck) {
             u.uswallow = 0;
-        else
+        } else {
             pline("%s rips into %s%s", The(fltxt), mon_nam(u.ustuck),
                   exclam(tmp));
-        /* Using disintegration from the inside only makes a hole... */
-        if (tmp == MAGIC_COOKIE)
-            u.ustuck->mhp = 0;
-        if (DEADMONSTER(u.ustuck))
-            killed(u.ustuck);
+            /* Using disintegration from the inside only makes a hole... */
+            if (tmp == MAGIC_COOKIE)
+                u.ustuck->mhp = 0;
+            if (DEADMONSTER(u.ustuck))
+                killed(u.ustuck);
+	}
         return;
     }
     if (type < 0)