From b75ce0b99682fbdab59768032d5701301cf9f759 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Sat, 11 Jun 2016 19:27:50 +0300
Subject: [PATCH] Prevent diagonal jump through open door

---
 src/dothrow.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/dothrow.c b/src/dothrow.c
index 2a70c8c35..b8a3778b5 100644
--- a/src/dothrow.c
+++ b/src/dothrow.c
@@ -544,9 +544,15 @@ int x, y;
     }
 
     if (!Passes_walls || !(may_pass = may_passwall(x, y))) {
-        if (IS_ROCK(levl[x][y].typ) || closed_door(x, y)) {
+        boolean odoor_diag = (IS_DOOR(levl[x][y].typ)
+                              && (levl[x][y].doormask & D_ISOPEN)
+                              && (u.ux - x) && (u.uy - y));
+        if (IS_ROCK(levl[x][y].typ) || closed_door(x, y)
+            || odoor_diag) {
             const char *s;
 
+            if (odoor_diag)
+                You("hit the door edge!");
             pline("Ouch!");
             if (IS_TREE(levl[x][y].typ))
                 s = "bumping into a tree";