For the record: After upload of MariaDB 1:10.11.3-1~exp1 the build failed 3 times in a row and MTR failed on different tests:
https://buildd.debian.org/status/fetch.php?pkg=mariadb&arch=ppc64&ver=1%3A10.11.3-1%7Eexp1&stamp=1685077417&raw=0 Completed: Failed 9/1059 tests, 99.15% were successful. Failing test(s): main.xa_prepared_binlog_off main.statistics_upgrade_not_done main.upgrade-check https://buildd.debian.org/status/fetch.php?pkg=mariadb&arch=ppc64&ver=1%3A10.11.3-1%7Eexp1&stamp=1684999385&raw=0 Completed: Failed 3/1055 tests, 99.72% were successful. Failing test(s): main.xa_prepared_binlog_off https://buildd.debian.org/status/fetch.php?pkg=mariadb&arch=ppc64&ver=1%3A10.11.3-1%7Eexp1&stamp=1685067613&raw=0 Completed: Failed 3/1055 tests, 99.72% were successful. Failing test(s): main.host_cache_size_functionality Test failures have different reasons but this seems common: [ERROR] InnoDB: Database page corruption on disk or a failed read of file './ibdata1' page [page id: space=0, page number=59].
