From 4dde0f0059bb2cb1f17a8f9d28080de17276990e Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Sun, 26 Apr 2015 13:26:26 +0200
Subject: [PATCH] isl_transitive_closure.c: construct_extended_path: handle
 NULL input

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_transitive_closure.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/isl_transitive_closure.c b/isl_transitive_closure.c
index 44df6c77..0cde6044 100644
--- a/isl_transitive_closure.c
+++ b/isl_transitive_closure.c
@@ -758,6 +758,9 @@ static __isl_give isl_map *construct_extended_path(__isl_take isl_space *dim,
 	unsigned d;
 	int i, j, n;
 
+	if (!map)
+		goto error;
+
 	d = isl_map_dim(map, isl_dim_in);
 
 	path = isl_map_identity(isl_space_copy(dim));
-- 
2.11.4.GIT