From 2aab906790a3d73b791cb3f2af91fe41ad641994 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Thu, 2 Feb 2023 00:33:44 +0100
Subject: Avoid passing NULL to memcpy

---
 libshouldbeinlibc/idvec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'libshouldbeinlibc/idvec.c')

diff --git a/libshouldbeinlibc/idvec.c b/libshouldbeinlibc/idvec.c
index 63f59f62..84131a62 100644
--- a/libshouldbeinlibc/idvec.c
+++ b/libshouldbeinlibc/idvec.c
@@ -163,7 +163,8 @@ idvec_set_ids (struct idvec *idvec, const uid_t *ids, unsigned num)
   err = idvec_ensure (idvec, num);
   if (!err)
     {
-      memcpy (idvec->ids, ids, num * sizeof (uid_t));
+      if (num)
+	memcpy (idvec->ids, ids, num * sizeof (uid_t));
       idvec->num = num;
     }
   return err;
-- 
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