I've gotten around to taking a look at this, and it's clear (from manual
inspection) that the emacs-bug-lite repository is corrupt, which means we need
more information to track down this bug--since I've no idea how the corrupt
repository was generated.  I'm taking a look at emacs-bug.tar.bz2 right now, but
expect that it will show the same corruption, in which case we'll have quite a
chore ahead, trying to figure out how the corruption was introduced.

Gour, would you be able (and willing) to try to reproduce the steps you took to
create this repository? In particular, I suspect it would be helpful to have the
separate unmerged repositories, plus a sequence to reproduce the current one
that shows the bug.  I understand this is quite hard to do, but it's something
that you'll probably find easier than we will, plus you might have the separate
repositories available as a starting point.

David