From 83fba62152fb3715e89a6ab7ed8f013b76550fbe Mon Sep 17 00:00:00 2001
From: Mika Kuoppala <miku@iki.fi>
Date: Wed, 13 Dec 2023 19:21:00 +0200
Subject: [PATCH] src/uhitm: Avoid touch_petrifies with invalid corpsenm

Before checking with touch_petrifies, check that corpsenm
is valid (>= LOW_PM)
---
 src/uhitm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/uhitm.c b/src/uhitm.c
index 6ab1fa8f0..886e62b44 100644
--- a/src/uhitm.c
+++ b/src/uhitm.c
@@ -1156,7 +1156,8 @@ hmon_hitmon_misc_obj(
                 change_luck(-5);
         }
 
-        if (touch_petrifies(&mons[obj->corpsenm])) {
+        if (obj->corpsenm >= LOW_PM
+            && touch_petrifies(&mons[obj->corpsenm])) {
             /*learn_egg_type(obj->corpsenm);*/
             pline("Splat!  You hit %s with %s %s egg%s!",
                   mon_nam(mon),