Re: [RFC/PATCHv2 2/6] add metadata-cache infrastructure

Jeff King [off-list ref] writes:

I considered briefly that a zero-width cache might actually be useful
for storing a membership list (i.e., "is this sha1 in the list or not").
But then you have no way of distinguishing "not in the list" from "have
no checked whether it should be in the list". You are probably better
off storing a single byte flag in such cases.

Good reasoning; if you are going to add "BUG:zero width", the above is a
good comment to have nearby.

Thanks.