A ref citing a bare filename, the way prose does, was matched against the
HEAD tree alone. A file that moved since the pin then resolved to its
HEAD path, which does not exist at the pin, and the ref reported GONE
with "pin revision missing": it failed for the one reason it never
should, its own success at HEAD.
The pin tree is searched first, HEAD stays the fallback, and the rename
search carries the pin path forward as it does for any written path.
This is what the resolver already documents for prefixed and suffixed
paths; the bare-name branch was the one that did not follow it.
linapple cites Memory.cpp, src/Memory.cpp at its pin and
src/apple2/Memory.cpp today. Its refs now name where the code went
instead of reporting it missing.
Abdessamad Derraz
6a0fb1e776