Comments - Why its mysqld error occurs during Mariabackup

me when triying to do full backup.

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2020-08-13  9:13:22 0 [Note] InnoDB: Number of pools: 1
2020-08-13  9:13:22 0 [Warning] InnoDB: Unable to open "./ib_logfile0" to check native AIO read support.
2020-08-13  9:13:22 0 [Warning] InnoDB: Linux Native AIO disabled.
2020-08-13  9:13:22 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2020-08-13  9:13:22 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2020-08-13 09:13:22 0x7f48384077c0  InnoDB: Assertion failure in file /home/buildbot/buildbot/build/mariadb-10.4.14/storage/innobase/fil/fil0fil.cc line 548
InnoDB: Failing assertion: success
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.
200813  9:13:22 [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.
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