The earlier repair worked from package lists produced by a one-off local symbol
scan. Those lists were derived from a candidate set seeded on one slot, so they
were a lower bound by construction, and they do not survive the machine that
made them.
abi_flat_safety now holds the authoritative answer for every slot: the
flat-safety backfill inspected all 95418 objects and recorded which cannot load
under which minor. 4077 are unsafe, against the 93% of compiled packages the
source classifier suspects.
Each object is rebuilt under every installed R minor with no --sensitive-only
gate. Since bincraft v5.3.0 the destination is decided by the built binary's
symbols, so a package needing a per-minor slot lands there and a portable one
lands in the flat slot. Gating on the source classifier is what let Rcpp slip
through and break every R 4.4 client on the slot.
This change will:
- add local/list-unsafe-flat-objects.R, printing the recorded unsafe objects
- fail loudly when a slot has no verdicts at all, since an empty repair list
would otherwise read as "nothing to do"
- add a manual workflow rebuilding them under every installed minor
pat-s
35b80da540