Comment # 23 on bug 1218864 from Giacomo Comes

(In reply to Anthony Iliopoulos from comment #21)
> Is this with 07318ee7e reverted? Does grub actually manage to boot the
> kernel after those errors?

No this is with 07318ee7e. If reverted, there is no error message. For the time
being I'm keeping around the faulty grub package for testing purpose.

And yes, at the end grub boots the kernel.
I only saw the message "attempt to read or write outside of partition" in the
recorded video with debug enabled, but it may well be that it is present also
without enabling debug and I just missed it because of the fast scrolling of
the error messages.