[00] 2020-09-03 07:41:07 DDL tracking : rename 3608442 "./beta/z_392.ibd","./beta/#sql-ib3608457.ibd"
2020-09-03 07:41:07 0x7f18a3c9f700  InnoDB: Assertion failure in file /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.4.13/extra/mariabackup/xtrabackup.cc line 664
InnoDB: Failing assertion: opt_no_lock
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/
InnoDB: about forcing recovery.
[00] 2020-09-03 07:41:07         ...done
[00] 2020-09-03 07:41:07 Copying ./beta/z_241.ibd to /mnt/backup/dbbackup_daily/20200903/beta/z_241.new
200903  7:41:07 [ERROR] mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.

Server version: 10.4.13-MariaDB
key_buffer_size=0
read_buffer_size=131072
max_used_connections=0
max_threads=1
thread_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 5932 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
[00] 2020-09-03 07:41:07         ...done
[00] 2020-09-03 07:41:07 Copying ./beta/z_242.ibd to /mnt/backup/dbbackup_daily/20200903/beta/z_242.new
stack_bottom = 0x0 thread_stack 0x49000
/bin/mariabackup(my_print_stacktrace+0x2e)[0x55b3b9a4e18e]
/bin/mariabackup(handle_fatal_signal+0x54d)[0x55b3b95b0b6d]
sigaction.c:0(__restore_rt)[0x7f18a7f03dd0]
:0(__GI_raise)[0x7f18a5fc999f]
:0(__GI_abort)[0x7f18a5fb3cf5]
/bin/mariabackup(+0x5c523d)[0x55b3b922d23d]
/bin/mariabackup(+0x577f0f)[0x55b3b91dff0f]
/bin/mariabackup(+0xb6ba71)[0x55b3b97d3a71]
/bin/mariabackup(+0xb6ef86)[0x55b3b97d6f86]
/bin/mariabackup(+0xb6f187)[0x55b3b97d7187]
/bin/mariabackup(+0x5f1f47)[0x55b3b9259f47]
/bin/mariabackup(+0x5f2340)[0x55b3b925a340]
pthread_create.c:0(start_thread)[0x7f18a7ef92de]
:0(__GI___clone)[0x7f18a608e4b3]
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units
Max cpu time              unlimited            unlimited            seconds
Max file size             unlimited            unlimited            bytes
Max data size             unlimited            unlimited            bytes
Max stack size            8388608              unlimited            bytes
Max core file size        unlimited            unlimited            bytes
Max resident set          unlimited            unlimited            bytes
Max processes             376958               376958               processes
Max open files            16384                16384                files
Max locked memory         16777216             16777216             bytes
Max address space         unlimited            unlimited            bytes
Max file locks            unlimited            unlimited            locks
Max pending signals       376958               376958               signals
Max msgqueue size         819200               819200               bytes
Max nice priority         0                    0
Max realtime priority     0                    0
Max realtime timeout      unlimited            unlimited            us
Core pattern: |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h ...
/etc/script/daily_db_backup_new.sh: line 26: 433785 Aborted                 (core dumped) /bin/mariabackup --defaults-file=/etc/mariabackup.cnf --backup --target-dir=/mnt/backup/dbbackup_daily/"$BACKUP_DAY"/