From 3cffc218e67c32f11c5f5e63f8787ea13388a237 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 13 Aug 2022 23:14:44 +0200
Subject: [PATCH] rulegen3:: genhoneycomb throws exception if rules not known

---
 rulegen3.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rulegen3.cpp b/rulegen3.cpp
index ff7857ab..28c2f5d2 100644
--- a/rulegen3.cpp
+++ b/rulegen3.cpp
@@ -1386,6 +1386,7 @@ vector<int> representative;
 
 void genhoneycomb(string fname) {
   if(WDIM != 3) throw hr_exception("genhoneycomb not in honeycomb");
+  if(!known()) throw hr_exception("rules not known");
 
   int qc = isize(t_origin);