From d2ffce1b14633bbc35460a7e5751647f0ad7e0d3 Mon Sep 17 00:00:00 2001
From: "zugz (tox)" <mbays+tox@sdf.org>
Date: Sun, 19 Aug 2018 23:22:45 +0200
Subject: [PATCH] check for NULL before freeing...

---
 toxcore/group.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/toxcore/group.c b/toxcore/group.c
index 447f74434cf..5a8c1dbe4cb 100644
--- a/toxcore/group.c
+++ b/toxcore/group.c
@@ -1002,8 +1002,13 @@ int del_groupchat(Group_Chats *g_c, uint32_t groupnumber)
         g->peer_on_leave(g->object, groupnumber, g->group[i].object);
     }
 
-    free(g->group);
-    free(g->frozen);
+    if (g->group) {
+        free(g->group);
+    }
+
+    if (g->frozen) {
+        free(g->frozen);
+    }
 
     if (g->group_on_delete) {
         g->group_on_delete(g->object, groupnumber);