6100abef33
Four confirmed P2 findings from the 2026-06-22 adversarial bug sweep.
None change the wire format / PeerState / GOSSIP_PROTO — all local.
- F-05: re-key the A8 rejoin archive (known_peers) and RecoveryContext
by topic_id ([u8; 32]) instead of the raw ticket string. A W7-
restamped member ticket shares the room's topic but not its string,
so a rejoin-from-Recents previously missed the retained bootstrap
bucket and dropped to an empty bootstrap — the exact dead-end A8
fixed. Topic is derived once via PeerSpeakTicket::topic_of in Join;
a malformed ticket now fails early and clean.
- F-06: an in-call Join no longer leaks the old room's peers/chat into
the new room, nor strands stale presence on a failed switch. Core
captures was_in_room, clears current_room at teardown, and emits a
new local UiEvent::RoomReset on every post-teardown failure path so
a failed switch lands idle on Home. The UI's room-scoped clearing is
factored into AppState::reset_room_state(), called by RoomLeft,
RoomReset, and at the top of RoomJoined — so a successful switch
clears+repopulates seamlessly on the Room screen (no Home bounce, no
leave chime).
- F-10: echo-cancel virtual nodes now get per-PID-unique names
(peerspeak_echocancel_{source,sink}.<pid>); the guard carries them
and core targets them instead of the fixed constants. unload_stale
only unloads our modules whose owner PID is dead (/proc check, cfg-
gated; conservative elsewhere), so enabling AEC in one instance can
no longer tear down another live instance's call. Pure
pid_from_ec_args / ec_module_is_stale seams.
- F-11: a recording write failure now stops recording atomically
(best-effort finalize via stop_recording + one UI Error) instead of
looping the error at ~50 Hz with silent data loss. Both mixer
branches release the recorder mutex before calling stop_recording to
avoid a self-deadlock on the non-reentrant std::Mutex.
407 lib tests pass (+4), clippy --all-targets clean, release build
green. Tests-green only; the rejoin (F-05), in-call switch (F-06),
two-instance AEC (F-10), and disk-full (F-11) paths need a real run.
Implemented by Codex, reviewed + gates re-run by senior.
Co-Authored-By: Codex <codex@openai.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>