Bug#573761: initramfs-tools: mkinitramfs fails with MODULES=dep if crypto-root fs has snapshot

[Nikolaus Schulz <microschulz@web.de>]

retitle 573761 initramfs-tools: mkinitramfs fails with MODULES=dep if crypto-root fs has snapshot
thanks

I really don't think that the - indeed not very helpful - error message
is the problem, but the fact that mkinitramfs (and thus
update-initramfs) doesn't work in the given scenario.

And how does one fix it when removing the snapshot isn't an acceptable
option?  Perhaps severity important would be more appropriate for this
bug.

Btw, from what I see on my box, the fix involves just catching yet
another indirection via /sys/block/${block}/slaves in dep_add_modules()
when chasing the root block device.

Nikolaus