From c3bbf920555f83634940f3e3993c649f6e3cc699 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 25 Jun 2010 19:40:02 +0200
Subject: [PATCH] isl_tab.c: close_row: fix error handling

---
 isl_tab.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/isl_tab.c b/isl_tab.c
index 5ea612c..695f7ba 100644
--- a/isl_tab.c
+++ b/isl_tab.c
@@ -1534,11 +1534,15 @@ static int close_row(struct isl_tab *tab, struct isl_tab_var *var)
 		if (isl_tab_push_var(tab, isl_tab_undo_zero, var) < 0)
 			return -1;
 	for (j = tab->n_dead; j < tab->n_col; ++j) {
+		int recheck;
 		if (isl_int_is_zero(mat->row[var->index][off + j]))
 			continue;
 		isl_assert(tab->mat->ctx,
 		    isl_int_is_neg(mat->row[var->index][off + j]), return -1);
-		if (isl_tab_kill_col(tab, j))
+		recheck = isl_tab_kill_col(tab, j);
+		if (recheck < 0)
+			return -1;
+		if (recheck)
 			--j;
 	}
 	if (isl_tab_mark_redundant(tab, var->index) < 0)
-- 
2.7.4