--echo #
--echo # MDEV-26249: Crash in in Explain_node::print_explain_for_children while writing to the slow query log
--echo #

--source include/have_innodb.inc

set @sql_tmp=@@slow_query_log;
SET GLOBAL slow_query_log = 1;
SET long_query_time = 0.000000;
SET log_slow_verbosity = 'explain';

CREATE TABLE t1 ( id varchar(50), KEY (id)) engine=innodb;
SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt WHERE 1=0;
select 1;

explain
SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt WHERE 1=0;

SET GLOBAL slow_query_log = @sql_tmp;
drop table t1;