From 001e6da00d2f98a910ffb784a31a616d41cdb513 Mon Sep 17 00:00:00 2001
From: Max Lv <max.c.lv@gmail.com>
Date: Thu, 8 Dec 2016 22:02:45 +0800
Subject: [PATCH] Fix #993

---
 libcork/ds/slice.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libcork/ds/slice.c b/libcork/ds/slice.c
index 68de06c8..96d72326 100644
--- a/libcork/ds/slice.c
+++ b/libcork/ds/slice.c
@@ -163,7 +163,8 @@ cork_slice_slice(struct cork_slice *slice, size_t offset, size_t length)
               slice->buf, slice->size,
               offset, length);
         */
-        cork_slice_invalid_slice_set(slice->size, offset, length);
+        if (slice != NULL)
+            cork_slice_invalid_slice_set(slice->size, offset, length);
         return -1;
     }
 }