Bug#732245: grub-common: "Warning: is a crypto device, which GRUB cannot read directly" without device name

[Axel Beckert]

Package: grub-common
Version: 2.00+20131208-1
Severity: normal

Dear GRUB Maintainers,

upgrading grub-{pc,common,…} from 2.00-22 to 2.00+20131208-1 issued the
following obviously incomplete output:

---snip---
Setting up grub-pc (2.00+20131208-1) ...
grub-install: warning: cannot open directory `/usr/share/locale-langpack': No such file or directory.
Installation finished. No error reported.
Generating grub configuration file ...
Warning:  is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
Warning:  is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
Found background image: .background_cache.png
Found linux image: /boot/vmlinuz-3.12-trunk-686-pae
Found initrd image: /boot/initrd.img-3.12-trunk-686-pae
Warning: /dev/mapper/sda2_crypt is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
Found linux image: /boot/vmlinuz-3.11-2-686-pae
Found initrd image: /boot/initrd.img-3.11-2-686-pae
Found linux image: /boot/vmlinuz-3.10-3-686-pae
Found initrd image: /boot/initrd.img-3.10-3-686-pae
Found linux image: /boot/vmlinuz-3.9-1-686-pae
Found initrd image: /boot/initrd.img-3.9-1-686-pae
Found linux image: /boot/vmlinuz-3.8-2-686-pae
Found initrd image: /boot/initrd.img-3.8-2-686-pae
Found linux image: /boot/vmlinuz-3.7-trunk-686-pae
Found initrd image: /boot/initrd.img-3.7-trunk-686-pae
Found linux image: /boot/vmlinuz-3.2.0-4-686-pae
Found initrd image: /boot/initrd.img-3.2.0-4-686-pae
Warning:  is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
Found iPXE image: /boot/ipxe.lkrn
Found memtest86 image: /memtest86.bin
Warning:  is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
Found memtest86+ image: /memtest86+.bin
Found memtest86+ multiboot image: /memtest86+_multiboot.bin
Found GRUB Invaders image: /boot/invaders.exec
Warning:  is a crypto device, which GRUB cannot read directly.  Some necessary modules may be missing from /boot/grub/grub.cfg.  You may need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See http://bugs.debian.org/542165 for details.
done
---snap---

While /dev/mapper/sda2_crypt is present in some warnings, some also just
contain an empty string where I would have expected the string
"/dev/mapper/sda2_crypt": "Warning:  is a crypto device …"

-- Package-specific info:
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-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (900, 'testing'), (899, 'testing-proposed-updates'), (600, 'stable'), (500, 'proposed-updates'), (200, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.12-trunk-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages grub-common depends on:
ii  gettext-base        0.18.3.1-2
ii  libc6               2.17-97
ii  libdevmapper1.02.1  2:1.02.77-6+b1
ii  libfreetype6        2.5.1-1
ii  libfuse2            2.9.2-4
ii  liblzma5            5.1.1alpha+20120614-2
ii  libpng12-0          1.2.49-5
ii  zlib1g              1:1.2.8.dfsg-1

Versions of packages grub-common recommends:
pn  os-prober  <none>

Versions of packages grub-common suggests:
ii  console-setup  1.104
ii  desktop-base   7.0.3
ii  grub-emu       2.00+20131208-1
pn  multiboot-doc  <none>
ii  xorriso        1.3.2-1

-- no debconf information