[Bug 1318457] [NEW] update-grub does not correctly account for loopmounted installs

[Noorez]

Public bug reported:

First discovered Ubuntu 13.10 during a kernel update from a fresh
install:

'/usr/sbin/grub-bios-setup: error: attempt to read or write outside of
disk `hostdisk//dev/loop2'.

** Affects: grub (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: lupin (Ubuntu) => grub (Ubuntu)

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https://bugs.launchpad.net/bugs/1318457

Title:
  update-grub does not correctly account for  loopmounted installs

Status in “grub” package in Ubuntu:
  New

Bug description:
  First discovered Ubuntu 13.10 during a kernel update from a fresh
  install:

  '/usr/sbin/grub-bios-setup: error: attempt to read or write outside of
  disk `hostdisk//dev/loop2'.

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