mirror of
https://github.com/PerpetualSoftware/pad.git
synced 2026-10-26 06:19:49 +00:00
xarmian
01021632c9
When a reverse patch fails, the walk resolves the next older row against the newer body (BUG-3655). diff-match-patch matches fuzzily, so when the failed row was a real link in the chain, the older patch can apply to the wrong base and return a wrong body with no error. That body was served in History, diffable and restorable. Every version row now records body_sha256, the hash of the body it stands for (migrations 148 / PG 118, nullable, never backfilled). Create, update and fenced-create rows stamp it; export carries it, and import keeps a well-formed one. The walk checks every resolved body against it. A mismatch is treated as a failed apply. An unhashed diff row below a failure or mismatch is served with its best-effort body, flagged unreconstructable with reason "unverified", and refused for restore and diff like a placeholder. A full-body or verified row re-anchors the walk. The BUG-3745 rebase leaves a hashed row whose rebuilt body does not match alone. The attachment remap verifies by hash, and re-mints a hash only for a body that verified. The History card renders the diff's 409 version_unreconstructable as "this edit's changes can't be shown" instead of a load error, and clears that state when a later fetch of the diff succeeds. It keeps Restore offered: the diff also reads the next newer row, so a verified, restorable version whose newer neighbour failed is refused by the diff. The restore checks only the version and decides; its refusal shows as "Restore failed: <message>". Out of scope: rows already wrong from pre-BUG-3745 throttle damage with no failure above them (no signal exists), and the legacy documents versions table. Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS