To reproduce, use PUT to upload this archive (`unzstd | base64 -d`):
KLUv/QRY7QIAxAJhL2IAMDAwMDY0NDAwMDAwMDEAADAwNzU2MAAgMAB1c3RhcgAwAGEAMzM3
YREA/UEF/EC9Y0AdDJBP8GDCTaDGBxATkAAd3gJoMPAbJANAciACGDTAsXKZngAR/m3nXA==
then issue any PATCH request to that site.
After this commit, the server returns "malformed manifest (not
a directory)" instead of "assignment to entry in nil map".
While ideally incoming manifests should be checked for consistency
regardless of how they're uploaded, in practice this is only a self-DoS
so it's probably not worth fixing.
V12-Ref: F-77244
This acts like `mkdir -p`, making it much less annoying to deploy
e.g. documentation preview generators that use deep paths.
Like before, the site must already exist: we cannot do a CAS on
a non-existent manifest at the moment.
Catherine
miyuko