Bug #77932 grant on master could break replication and unauthorised user creation slaves

Description:
A grant failed on master could break the replication. Also, the user not created on master is created on slaves.

How to repeat:
Master with slave.

On master as root:

grant usage,select,create routine,execute on test.* to 'miguel'@'%' with grant option;

On master as miguel:

CREATE FUNCTION hello (s CHAR(20)) RETURNS CHAR(50) DETERMINISTIC RETURN CONCAT('Hello, ',s,'!');

GRANT EXECUTE on FUNCTION hello TO 'yyy'@'%';

Last command fails with:

ERROR 1410 (42000): You are not allowed to create a user with GRANT

and slave breaks with:

               Last_SQL_Error: Query caused different errors on master and slave. Error on master: message (format)='You are not allowed to create a user with GRANT' error code=1410 ; Error on slave: actual message='no error', error code=0. Default database: 'test'. Query: 'GRANT EXECUTE on FUNCTION hello TO 'yyy'@'%''

so, the user yyy is created on the slave.

I cannot repeat on 5.6.

Hello Miguel,

Thank you for the report.
Verified as described on 5.5.45 GA build.

Thanks,
Umesh

test results

Attachment: 77932_5.5.45.results (application/octet-stream, text), 9.28 KiB.

-- 5.5.46 build is also affected but I'm not seeing this issue on 5.6.27 builds

test results

Attachment: 77932_5.5.46.results (application/octet-stream, text), 12.22 KiB.