bug#24141: RAID reconfigure ERROR: Wrong type (expecting string): ("/dev/sdb1" "/dev/sdc1")

[myglc2]

This is a followup to bug#24135. 

Note: This may duplicate, Gmane swallowed my reply yesterday.

With bug#24135 commits in place the system reconfigure completes w/
'Installation finished. No error reported.'  _but_ shows an embedded
error ...

ERROR: Wrong type (expecting string): ("/dev/sdb1" "/dev/sdc1")

... and the system does not boot.

This is really 2 bugs

1) a problem w/the RAID mechanism and/or my config

2) reconfigure should not complete when shepherd produces errors

version info:

guix (GNU Guix) 0.11.0
address@hidden ~#   File: '/root/.config/guix/latest' -> '/home/g1/src/guix'
address@hidden ~# v0.10.0-2118-g1061862
address@hidden ~# 1061862 mapped-devices: raid-device-mapping: Avoid 
non-top-level 'use-modules'.
address@hidden ~# address@hidden ~# 

reconfigure:

address@hidden ~# guix system reconfigure system40.scm
/gnu/store/nn051a04gas6x3g6xhbi8x0ca38akbzk-system
/gnu/store/dsq79n5a8p21ca7zc38yzxzi9hk0mhzp-grub.cfg
/gnu/store/zgm8s5z5y9dh0g36jqxh5i30js93irk5-grub-2.02beta3
activating system...
setting up setuid programs in '/run/setuid-programs'...
populating /etc from /gnu/store/3vbg3i84k9z57kj5xwz91h08b59mh9yb-etc...
usermod: no changes
usermod: no changes
usermod: no changes
making '/gnu/store/nn051a04gas6x3g6xhbi8x0ca38akbzk-system' the current 
system...
guix system: unloading service 'device-mapping-/dev/md0'...
shepherd: Removing service 'device-mapping-/dev/md0'...
shepherd: Done.
guix system: unloading service 'file-system-/mnt/md0'...
shepherd: Removing service 'file-system-/mnt/md0'...
shepherd: Done.
guix system: loading new services: device-mapping-/dev/md0 
file-system-/mnt/md0...
shepherd: Evaluating user expression (register-services (primitive-load 
"/gn...") #).
guix system: error: exception caught while executing 'start' on service 
'device-mapping-/dev/md0':
ERROR: Wrong type (expecting string): ("/dev/sdb1" "/dev/sdc1")
Installing for i386-pc platform.
Installation finished. No error reported.

config and shepherd log attached.

TIA - George

shepherd40.log
Description: Binary data

system40.scm
Description: Binary data