From ac97d86f677b38c75074c7c2b0f2a6ade6d930e8 Mon Sep 17 00:00:00 2001
From: Donald Buczek <buczek@molgen.mpg.de>
Date: Tue, 3 May 2022 11:20:00 +0200
Subject: [PATCH] mx_mxql: Initialize s->func

When we run into a (very unlikely) early error condition, the error
macros might output s->func. While glibc printf functions output
"(null)" if NULL is passed to "%s", this is not guaranteed.

For example, gcc transforms `printf("%s\n", ptr)` into `puts(ptr)`.
---
 mx_mysql.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mx_mysql.c b/mx_mysql.c
index aff7bc02..87e4789b 100644
--- a/mx_mysql.c
+++ b/mx_mysql.c
@@ -945,6 +945,7 @@ static int mx_mysql_statement_init(struct mx_mysql *mysql, struct mx_mysql_stmt
     s = mx_calloc_forever(1, sizeof(*s));
 
     s->mysql       = mysql;
+    s->func = "";
 
     do {
         res = mx__mysql_stmt_init(s);