Re: [PATCH] Fix "unpack-objects --strict"

> Martin Koegler <mkoegler@auto.tuwien.ac.at> writes:
> > To introduce a object with one of its linked objects missing, left it
> > out of the pack and push it into the repository. unpack-objects will
> > unpack all objects and fail updating the ref (but leave all objects in
> > the repository). As second step, simply send a ref update request,
> > which should succed, as the object is present in the repository.
> 
> Your "ref update request" exploit does not work because your understanding
> of how we decide to allow updating a ref is flawed.
> 
> We do not blindly update a ref to a commit only because we happen to have
> that commit.  We require that commit to reach existing tips of refs
> without break.  The logic is in quickfetch() in builtin-fetch.c.