From 3294cd11f852357b638cac74ba32578ffb456fc7 Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Sat, 16 Apr 2016 17:36:47 +0200
Subject: [PATCH] MDEV-9929 MariaDB segfaults on command "mysqld --version"
 with ignore-db-dir option on /etc/my.cnf

don't put command-line arguments into opt_ignore_db_dirs -
it is supposed to contain a malloc()'ed accumulated
list of all ignored dirs
---
 sql/mysqld.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index fb52041fbc2..3450447ceb9 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -7800,6 +7800,7 @@ mysqld_get_one_option(int optid,
 
 
   case OPT_IGNORE_DB_DIRECTORY:
+    opt_ignore_db_dirs= NULL; // will be set in ignore_db_dirs_process_additions
     if (*argument == 0)
       ignore_db_dirs_reset();
     else