ls: reading directory /var/lib/os-prober/mount: Numerical result out of range

[Laurent Bigonville]

Binary package hint: grub-pc

Hi,

I've just updated my natty box and when running update-grub I get the following message : ls: reading directory /var/lib/os-prober/mount: Numerical result out of range

bigon@fornost:~$ LANG=C sudo update-grub
Generating grub.cfg ...
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-2.6.38-8-generic
Found initrd image: /boot/initrd.img-2.6.38-8-generic
Found linux image: /boot/vmlinuz-2.6.38-7-generic
Found initrd image: /boot/initrd.img-2.6.38-7-generic
Found memtest86+ image: /memtest86+.bin
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
ls: reading directory /var/lib/os-prober/mount: Numerical result out of range
Found Windows 7 (loader) on /dev/sda1
Found Ubuntu Natty (development branch) (11.04) on /dev/mapper/fornost-natty_amd64_chroot
Found Debian GNU/Linux (wheezy/sid) on /dev/mapper/fornost-sid_amd64_chroot
done