From 316b8d4f7ceda0c853f572e289e819cf9acc9a2c Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 28 Dec 2021 11:35:59 +0100
Subject: [PATCH] rulegen:: also set sidecache for the reverse twalker

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

diff --git a/rulegen.cpp b/rulegen.cpp
index 5553b191..b48d21e0 100644
--- a/rulegen.cpp
+++ b/rulegen.cpp
@@ -1170,7 +1170,7 @@ int get_side(twalker what) {
       }
     }
 
-  if(side) sidecache[what] = res;
+  if(side) sidecache[what] = res, sidecache[what + wstep] = -res;
   return res;
   }