From fad017fcb465d32bb7739af1ff83c0271601e5e2 Mon Sep 17 00:00:00 2001
From: vsc <vsc@b08c6af1-5177-4d33-ba66-4b1c6b8b522a>
Date: Mon, 10 Sep 2007 22:04:10 +0000
Subject: [PATCH] fix core dump in tabling

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1922 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
---
 C/exec.c         | 2 +-
 changes-5.1.html | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/C/exec.c b/C/exec.c
index acbfc7c33..c58510631 100644
--- a/C/exec.c
+++ b/C/exec.c
@@ -1462,7 +1462,7 @@ init_stack(int arity, CELL *pt, int top, choiceptr saved_b)
   B = (choiceptr)ASP;
   B--;
 #ifdef TABLING
-  if (top) {
+  if (top && GLOBAL_root_dep_fr) {
     DepFr_cons_cp(GLOBAL_root_dep_fr) = B;
   }
 #endif /* TABLING */
diff --git a/changes-5.1.html b/changes-5.1.html
index 26a332263..61dfc85ef 100644
--- a/changes-5.1.html
+++ b/changes-5.1.html
@@ -16,6 +16,7 @@
 
 <h2>Yap-5.1.3:</h2>
 <ul>
+<li> FIXED: tabling broken (obs from Will Benton).</li>
 <li> FIXED: updates to SWI C-interface and corresponding extensions to
 C-interface .</li>
 <li> FIXED: be careful to give delayarena exactly what it needs to expand.</li>