main.long_unique failed on ppc64el on Ubuntu 21.10 autopkgtest

main.long_unique                         w1 [ fail ]

        Test ended at 2021-12-02 15:01:58

CURRENT_TEST: main.long_unique

mysqltest: At line 409: query 'insert into t1 values(concat(repeat('sachin',10000000),'1'),concat(repeat('sachin',10000000),'1'),

concat(repeat('sachin',10000000),'1'))' failed: 2013: Lost connection to MySQL server during query

The result from queries just before the failure was:

< snip >

Field	Type	Null	Key	Default	Extra

a	longblob	YES	UNI	NULL	

b	longblob	YES	MUL	NULL	

c	longblob	YES		NULL	

show create table t1;

Table	Create Table

t1	CREATE TABLE `t1` (

  `a` longblob DEFAULT NULL,

  `b` longblob DEFAULT NULL,

  `c` longblob DEFAULT NULL,

  UNIQUE KEY `a` (`a`) USING HASH,

  UNIQUE KEY `b` (`b`,`c`) USING HASH

) ENGINE=MyISAM DEFAULT CHARSET=latin1

show keys from t1;

Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment

t1	0	a	1	a	A	NULL	NULL	NULL	YES	HASH		

t1	0	b	1	b	A	NULL	NULL	NULL	YES	HASH		

t1	0	b	2	c	A	NULL	NULL	NULL	YES	HASH		

insert into t1 values(concat(repeat('sachin',10000000),'1'),concat(repeat('sachin',10000000),'1'),

concat(repeat('sachin',10000000),'1'));

More results from queries before failure can be found in /tmp/tmp.P0sky4MUVI/var/1/log/long_unique.log

Server [mysqld.1 - pid: 4618, winpid: 4618, exit: 256] failed during test run

Server log from this test:

----------SERVER LOG START-----------

----------SERVER LOG END-------------