kern/51362: installing from USB sticks is not possible

[martin%NetBSD.org@localhost]

>Number:         51362
>Category:       kern
>Synopsis:       installing from USB sticks is not possible
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 26 18:40:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.34
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 7.99.34 NetBSD 7.99.34 (NIGHT-OWL) #422: Tue Jul 26 13:40:41 CEST 2016 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

Booting an USB install image, like
http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/201607260800Z/images/NetBSD-7.99.34-amd64-install.img.gz

with boot -a (because I have a broke raid config that I want to recover)
failed. After forcing root to sd0a init dies with "no /dev/console".

However, the filesystem has a perfectly fine /dev/console:

# ll /mnt/dev/console 
crw-------  1 root  wheel  0, 0 Jul 11 19:01 /mnt/dev/console


>How-To-Repeat:
s/a

>Fix:
n/a