commit 14dd0c020072c161827a75e3a4a236f134a8960c
author Daniel Stenberg <daniel@haxx.se> Mon Mar 30 23:51:45 2020 +0200
committer Daniel Stenberg <daniel@haxx.se> Tue Mar 31 09:44:23 2020 +0200
tree 60b9b6c555c85a097fecca5644eb98fe69f0f1e3
parent 0e607542dca1247217997184224fc1a779778166

memdebug: don't log free(NULL)

... it serves no purpose and fills up the log.

lib/memdebug.c

diff --git a/lib/memdebug.c b/lib/memdebug.c
index ede6009..1c6b151 100644
--- a/lib/memdebug.c
+++ b/lib/memdebug.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -328,7 +328,7 @@
     (Curl_cfree)(mem);
   }
 
-  if(source)
+  if(source && ptr)
     curl_dbg_log("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
 }