[Bug 1311247] Re: error: malformed file, press any key to continue

[Søren Løvborg]

So, this appears to be caused by a well-intentioned sanity check in Grub
that sees an error where there's none when checking grubenv files
spanning multiple "blocks".

In checking that blocks don't overlap, the code has an if-statement that
appears to be accidentally negated ("if (s2 > s1)", should be "if (s1 >
s2)"), causing Grub to *always* report an error *unless* all blocks
overlap. Offending commit appears to be cb72aa1.

I can only assume that the only reason this hasn't been caught earlier
is that the grubenv file most commonly only consists of one Grub
"block"?

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https://bugs.launchpad.net/bugs/1311247

Title:
  error: malformed file, press any key to continue

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  I have just upgraded from 12.04 to 14.04

  Since the upgrade, when I boot up, the process stops and the normal
  grub screen is replaced after a short while by a message saying

  "error: malformed file, press any key to continue"

  Pressing a key allows booting to continue.

  Someone else who experienced this found that the problem went away
  after having re-installed grub.  I tried this but this did not resolve
  the problem for me.

  synaptic reports the grub package as 2.02~beta2-9

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