Re: maintenance of cache-tree data

Junio C Hamano [off-list ref] writes:

The number one reason was because the current index file format
is pretty dense, and I did not find an obvious hole in the
front, in the middle or at the tail to sneak extra data in
without upsetting existing code and without updating index file
version.

Well, I was blind ;-).  As long as the whole-file SHA1 matches,
read_cache() does not care if we have extra data after the
series of active_nr cache entry data in the index file.

I'm working on a patch now.