Bug #5705 SET CHARATER_SET_SERVERetc will be lost if STOP SLAVE before following query

Description:
To propagate charset information between master and slave, starting from 4.1 master writes
SET CHARACTER_SET_SERVER=..., ... ;
to binlog before every query which needs it. As this makes two independent binlog query events, if STOP SLAVE interrupts the slave SQL thread between the two, then at restart the query will be executed without the SET.

How to repeat:
depends on timing (or you can use START SLAVE UNTIL to test).

Suggested fix:
modify one line in Query_log_event::exec_event().

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Additional info:

ChangeSet@1.2027, 2004-09-23 12:16:56+02:00, guilhem@mysql.com