Bug#666559: installation with btrfs fails due to grub-installer error

[Miguel Figueiredo <elmig@debianpt.org>]

Package: grub-installer
Version: 1.70
Tags: d-i

Installation fails while using BTRFS during grub-installer step.
Log attached.

Mar 31 18:07:45 grub-installer: info: Installing grub on '/dev/sda'
Mar 31 18:07:45 grub-installer: info: grub-install supports --no-floppy
Mar 31 18:07:45 grub-installer: info: Running chroot /target 
grub-install  --no-floppy --force "/dev/sda"
Mar 31 18:07:45 grub-installer: /usr/sbin/grub-probe: error:
Mar 31 18:07:45 grub-installer:
Mar 31 18:07:45 grub-installer: cannot find a device for /boot/grub (is 
/dev mounted?)
Mar 31 18:07:45 grub-installer: .
Mar 31 18:07:45 grub-installer: error: Running 'grub-install 
--no-floppy --force "/dev/sda"' failed.

--
Melhores cumprimentos/Best regards,

Miguel Figueiredo

Attachment: syslog.gz
Description: GNU Zip compressed data