I just got this with
gitk --bisect
while doing some bisection on my current kernel.
It happens with "git rev-parse --bisect" too, but interestingly, "git
log --bisect" works fine.
I have not tried to figure out anything further, except that it was
introduced by commit b9c8e7f2f ("prefix_ref_iterator: don't trim too
much") and it happens with
iter->iter0->refname = "refs/bisect/bad"
iter->trim = 15
(where 15 is also the same as the length of that refname).
Not having time to chase this down any more, since I'm busy with the
merge window (and that annoying bisect)
Linus
