LP:795530 - Wrong result with subquery semijoin materialization and outer join

The following query over the 'world' database incorrectly produces wrong result
of 1 row instead of an empty result:

create database world;
use world;
source mysql-test/include/world_schema.inc
source mysql-test/include/world.inc

set @@optimizer_switch='materialization=on,semijoin=on';

MariaDB [world]> select * from CountryLanguage where (Language, Country) IN (SELECT City.Name, Country.Code FROM City LEFT JOIN Country ON (Country = Code and Code > 'LLL'));
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1 row in set (0.22 sec)

set @@optimizer_switch='materialization=on,semijoin=off';
=> empty result;