From 6747cb21debbe678f15e94a0fd696b0b323e2a86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADtor=20Santos=20Costa?= <vitor@ubuntu.(none)>
Date: Wed, 24 Sep 2008 00:12:32 +0100
Subject: [PATCH] do not allow backtracking to a frozen CP.

---
 OPTYap/tab.macros.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/OPTYap/tab.macros.h b/OPTYap/tab.macros.h
index 003d3d757..66410f005 100644
--- a/OPTYap/tab.macros.h
+++ b/OPTYap/tab.macros.h
@@ -669,6 +669,8 @@ freeze_current_cp(void) {
   B_FZ  = freeze_cp;
   H_FZ  = freeze_cp->cp_h;
   TR_FZ = freeze_cp->cp_tr;
+  B = B->cp_b;
+  HB = B->cp_h;
   return freeze_cp;
 }