From f2b75c3b0eca99cc0404a1319fe806f21aa9b7d2 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Fri, 17 Mar 2023 14:14:06 +0200
Subject: [PATCH] Fuzzer randomly teleports between dungeon branches

Previously the fuzzer usually stayed in the Dungeons of Doom,
only very rarely going to other dungeon branches. Now, it will
randomly choose a dungeon branch and a level in that branch
to level teleport to.
---
 src/teleport.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/teleport.c b/src/teleport.c
index 9027dbef9..1eef5a146 100644
--- a/src/teleport.c
+++ b/src/teleport.c
@@ -859,8 +859,16 @@ level_tele(void)
     char buf[BUFSZ];
     boolean force_dest = FALSE;
 
-    if (iflags.debug_fuzzer)
-        goto random_levtport;
+    if (iflags.debug_fuzzer) {
+        do {
+            newlevel.dnum = rn2(gn.n_dgns);
+        } while (newlevel.dnum == astral_level.dnum
+                 || gd.dungeons[newlevel.dnum].flags.unconnected
+                 || !gd.dungeons[newlevel.dnum].num_dunlevs);
+        newlevel.dlevel = 1 + rn2(dunlevs_in_dungeon(&newlevel));
+        schedule_goto(&newlevel, UTOTYPE_NONE, (char *) 0, (char *) 0);
+        return;
+    }
     if ((u.uhave.amulet || In_endgame(&u.uz) || In_sokoban(&u.uz))
         && !wizard) {
         You_feel("very disoriented for a moment.");