Linus Torvalds [off-list ref] writes:
What is your git version? The _real_ fix probably is to just upgrade. Are
you using that broken(*) Debian git package by any chance?
Linus
(*) By broken I mean "stable cannot be bothered to upgrade packages to
modern versions, and is still on some ancient 1.4-based git version"
Well, although git 1.4 is ancient in git timescale, you can keep
your repository friendly with older versions of git and 1.4
certainly is not too old for that. In other words, newer git
lets you choose to make your repository unreadable by 1.4, and
you chose to do so, perhaps for a good reason.
Should we call git 1.5 "backward incompatible" with 1.4, because
it allows you (or anybody) to make that choice? I dunno.