mariabackup --compress --parallel=4 hangs in current 10.5.17 from GitHub

[openxs@fc35 maria10.5]$ bin/mariabackup --user=openxs --backup --compress --parallel=4 --target-dir=/tmp/backup/

[00] 2022-07-06 11:38:15 Connecting to MySQL server host: localhost, user: openxs, password: not set, port: not set, socket: not set

[00] 2022-07-06 11:38:15 Using server version 10.5.17-MariaDB

[00] 2022-07-06 11:38:15 Warning: option 'datadir' has different values:

  '/var/lib/mysql' in defaults file

  '/home/openxs/dbs/maria10.5/data/' in SHOW VARIABLES

bin/mariabackup based on MariaDB server 10.5.17-MariaDB Linux (x86_64)

[00] 2022-07-06 11:38:15 uses posix_fadvise().

[00] 2022-07-06 11:38:15 cd to /home/openxs/dbs/maria10.5/data/

[00] 2022-07-06 11:38:15 open files limit requested 0, set to 100000

[00] 2022-07-06 11:38:15 mariabackup: using the following InnoDB configuration:

[00] 2022-07-06 11:38:15 innodb_data_home_dir = 

[00] 2022-07-06 11:38:15 innodb_data_file_path = ibdata1:12M:autoextend

[00] 2022-07-06 11:38:15 innodb_log_group_home_dir = ./

[00] 2022-07-06 11:38:15 InnoDB: Using Linux native AIO

2022-07-06 11:38:15 0 [Note] InnoDB: Number of pools: 1

^C

[openxs@fc35 maria10.5]$ ls -l /tmp/backup/*

-rw-r-----. 1 openxs openxs 0 Jul  6 11:38 /tmp/backup/ib_logfile0.qp

[openxs@fc35 maria10.5]$ 

[openxs@fc35 server]$ git log -1

commit 0fca5068a88e9baee2ba06914885e80ca6c330ad (HEAD -> 10.5, origin/bb-10.5-serg, origin/10.5)

Author: Sergei Golubchik <serg@mariadb.org>

Date:   Mon Jul 4 20:20:20 2022 +0200

    MDEV-28234 Change maturity of plugins for July 2022 Releases

    mysql_json: GAMMA -> STABLE

[openxs@fc35 server]$ git log -1

commit ea40c75c2793f15e57482a0b374ab48b81b8e3ac (HEAD -> 10.5, origin/10.5)

Merge: a0e4853eff0 99c8aed00d8

Author: Marko Mäkelä <marko.makela@mariadb.com>

Date:   Wed May 25 14:24:51 2022 +0300

    Merge 10.4 into 10.5