I will use MDEV-13869 MariaDB slow start for tracking this fix. The fix is not as trivial as I thought; I got some of my corruption-injection tests failing.
Furthermore, I think that in MariaDB 10.2+, we could remove the
extended checks also when crash recovery is needed, to avoid unnecessarily long downtime. That one is the
already mentioned MDEV-9843 InnoDB hangs on startup…. Related to that, there is also MDEV-14481 Execute InnoDB crash recovery in the background which we could have in MariaDB 10.4 or maybe even earlier.