From c5888373751112266cc343e2bca4bc5abd791df0 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 31 Jul 2021 20:28:51 +0200
Subject: [PATCH] rulegen:: fixed a crash in generate_random_path when
 exploring a dead branch

---
 geometry2.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/geometry2.cpp b/geometry2.cpp
index bb04af1a..f7255ad8 100644
--- a/geometry2.cpp
+++ b/geometry2.cpp
@@ -912,9 +912,9 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor, b
           if(!launched) {
             t = ycw.at->master->fieldval;
             bignum b = expansion.get_descendants(length-i, t);
+            if(!full_id.approx_int()) goto stupid;
             p.full_id_0 = full_id = hrand(b);
             /* it may happen that the subtree dies out */
-            if(!full_id.approx_int()) goto stupid;
             launched = true;
             }