During upgrade from 4.9.0-8-rt-686-pae to 4.19.0-0.bpo.4-rt-686-pae I've got two warnings.
First is about deprecating running service with start/stop. Second about lacking tags in insserv.

After updating grub first two boots failed. Third was half-success.
Boot hanged for about a minute at:

[....] Waiting for /dev to be fully populated.

Then system loaded without errors or warnings. Unfortunately during restart eudev failed to stop.

[] Stopping the hotplug events dispatcher: eudev failed!
ERROR: eudev failed to stop

Inside a trace there's:

BUG: unable to handle kernel paging request at xxxxxxxx

Switched back to 4.9, and everything is ok.
I'm on Devuan 2.0 ASCII, Core2Duo Merom 32bit, lvm+lukscrypt
Also in dmesg there are couple acpi warnings about drivers.

I'd appreciate any kind of help with this. I can provide full trace or logs if needed.
Sorry, if my english is bad - I'm not a native speaker.

EDIT:
Solved lond time ago with kernel 4.19.0-6 update.