autopkgtest fails for 8.0.31 on ppc64el

When autopkgtests for mysql run on ppc64el, the test main.regular_expressions_utf-8 fails with the following info:

CURRENT_TEST: main.regular_expressions_utf-8
mysqltest: At line 616: Query 'DO '1' regexp repeat('$', 50000000)' failed with wrong error 2013: 'Lost connection to MySQL server during query', should have failed with error '3700'.

The result from queries just before the failure was:
# Test that the replacement buffer can grow beyond the maximum VARCHAR
# column length.
#
CREATE TABLE t1 ( a TEXT );
INSERT INTO t1 VALUES ( repeat( 'a', 16384 ) );
SELECT char_length ( regexp_replace( a, 'a', 'b' ) ) FROM t1;
char_length ( regexp_replace( a, 'a', 'b' ) )
16384
SET GLOBAL regexp_time_limit = 10000;
SELECT regexp_like ( regexp_replace( a, 'a', 'b' ), 'b{16384}' ) FROM t1;
regexp_like ( regexp_replace( a, 'a', 'b' ), 'b{16384}' )
1
SET GLOBAL regexp_time_limit = DEFAULT;
DROP TABLE t1;
#
# Bug#27134570: DOS: REGEXP TAKES EXPONENTIALLY LONGER, CAN'T BE KILLED,
# HOGS CPU
#
DO '1' regexp repeat('$', 50000000);
ERROR HY000: Lost connection to MySQL server during query
safe_process[47731]: Child process: 47732, exit: 1

Server [mysqld.1 - pid: 47662, winpid: 47662, exit: 256] failed during test run
Server log from this test:
----------SERVER LOG START-----------
safe_process[47662]: Child process: 47663, killed by signal: 9
----------SERVER LOG END-------------

 - the logfile can be found in '/tmp/tmp.mSRlhxaIrc/var/log/main.regular_expressions_utf-8/regular_expressions_utf-8.log'

For example, see: https://autopkgtest.ubuntu.com/results/autopkgtest-lunar/lunar/ppc64el/m/mysql-8.0/20221205_235042_c519f@/log.gz