From b35a6a202fe8bd218af5152420e1dabeb79f10d4 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Sun, 2 Dec 2012 17:37:17 +0100
Subject: [PATCH] isl_tab.c: push_union: handle NULL input

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_tab.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/isl_tab.c b/isl_tab.c
index 6089f3a1..3fc0367f 100644
--- a/isl_tab.c
+++ b/isl_tab.c
@@ -787,6 +787,8 @@ static int push_union(struct isl_tab *tab,
 {
 	struct isl_tab_undo *undo;
 
+	if (!tab)
+		return -1;
 	if (!tab->need_undo)
 		return 0;
 
-- 
2.11.4.GIT