From f46cd2732ab2eb1bee483122dfd9460a9fc03d30 Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Sun, 3 Nov 2024 09:08:11 -0500
Subject: [PATCH] W_NONDIGGABLE collisions with overloaded rm flags fields

Resolves #1308
---
 src/mkmaze.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mkmaze.c b/src/mkmaze.c
index 4237e00e9..0687a6c30 100644
--- a/src/mkmaze.c
+++ b/src/mkmaze.c
@@ -1437,7 +1437,8 @@ bound_digging(void)
 
     for (x = 0; x < COLNO; x++)
         for (y = 0; y < ROWNO; y++)
-            if (y <= ymin || y >= ymax || x <= xmin || x >= xmax)
+            if (IS_STWALL(levl[x][y].typ)
+                && (y <= ymin || y >= ymax || x <= xmin || x >= xmax))
                 levl[x][y].wall_info |= W_NONDIGGABLE;
 }