From db56fd008c118246a0ee92c2949b3502fbe324ba Mon Sep 17 00:00:00 2001
From: Ramil Kalimullin <ramil@mysql.com>
Date: Wed, 9 Jul 2008 16:52:26 +0500
Subject: [PATCH] Fix for bug#37669: Server crash by setting
 "@@session.innodb_table_locks"

Problem: reading/writing data from/to an address without proper
alignment leads to SIGBUS on some platforms.

Fix: use the correct data type when dereferencing variable values.
---
 sql/sql_plugin.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/sql_plugin.cc b/sql/sql_plugin.cc
index 0fe79a8945d..b9733f2eec0 100644
--- a/sql/sql_plugin.cc
+++ b/sql/sql_plugin.cc
@@ -1882,7 +1882,7 @@ static int check_func_bool(THD *thd, struct st_mysql_sys_var *var,
     }
     result= (int) tmp;
   }
-  *(int*)save= -result;
+  *(my_bool *) save= -result;
   return 0;
 err:
   my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), var->name, strvalue);
@@ -2063,7 +2063,7 @@ err:
 static void update_func_bool(THD *thd, struct st_mysql_sys_var *var,
                              void *tgt, const void *save)
 {
-  *(my_bool *) tgt= *(int *) save ? 1 : 0;
+  *(my_bool *) tgt= *(my_bool *) save ? TRUE : FALSE;
 }