parts.partition_debug fails when it's run after another test

perl ./mtr --noreorder main.partition_symlink parts.partition_debug

main.partition_symlink                   [ pass ]     56

parts.partition_debug                    [ fail ]  Found warnings/errors in server log file!

        Test ended at 2020-08-03 01:39:07

line

2020-08-03  1:39:04 0 [ERROR] mysqld: Table './mysql/user' is marked as crashed and should be repaired

2020-08-03  1:39:04 0 [Warning] Checking table:   './mysql/user'

2020-08-03  1:39:04 0 [ERROR] mysql.user: 1 client is using or hasn't closed the table properly

^ Found warnings in /data/bld/10.3-debug/mysql-test/var/log/mysqld.1.err

ok