From 57a2b04007c994de9fd47ea3ce5e5df9633023d1 Mon Sep 17 00:00:00 2001
From: "reggie@mdk10.(none)" <>
Date: Thu, 26 May 2005 14:02:18 -0500
Subject: [PATCH] Bug #10181 mysqld.exe crash with an access violation after
 INSERT INTO mysql.host

sql_acl.cc:
  Make sure host.db is a valid string pointer before we do our lower_case_table_names comparison
---
 sql/sql_acl.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 02da05d195f..ae360fab019 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -198,7 +198,7 @@ my_bool acl_init(THD *org_thd, bool dont_read_acl_tables)
     ACL_HOST host;
     update_hostname(&host.host,get_field(&mem, table->field[0]));
     host.db=	 get_field(&mem, table->field[1]);
-    if (lower_case_table_names)
+    if (lower_case_table_names && host.db)
     {
       /*
        We make a temporary copy of the database, force it to lower case,