The packaged AppDir has an intermittent SIGSEGV during startup, in the
window between QGuiApplication construction and the QML engine coming up,
with the tokio workers, the audio thread, the loudness analyzer, the
visualizer producer and connectivity all running beside it. It hit twice
on 2026-09-08 on unrelated commits: the v2.1.0 tag's own release-flatpak
attempt 1, which then passed on a re-run of the identical commit, and the
#745 bugfix branch. Both left the same evidence - "status -11" and a log
that stops mid-startup - which is nothing to act on, and a user who hits
this has no re-run to reach for.
The process now reports its own death. A handler for SIGSEGV, SIGBUS,
SIGILL, SIGFPE and SIGABRT writes the signal, the faulting address, the
thread and a backtrace to stderr and flushes the file sink, so the next
occurrence names a frame instead of costing another round trip. It runs
on a dedicated signal stack so a stack-overflow fault can still report,
latches against re-entry, and arms alarm() BEFORE capturing anything:
taking a backtrace allocates and takes loader locks, so a fault inside
malloc could otherwise deadlock the handler and turn a crash into a hang.
The signal is re-raised with the default disposition restored, so the
wait status stays the signal and CI, the smoke harness and any core dump
still see a crash. The integration test asserts exactly that pair on a
child segfaulted on purpose, and it is a named gate in test-crates and
its local mirror.
qbzd installs it too: a headless daemon that dies of a signal leaves even
less behind than the GUI.
cc
Sleep timer (queue footer): tokio monotonic deadline + 1Hz countdown that
fires core().pause() at expiry; presets + custom minutes via a popover.
Stop after this song: 4 QbzCore passthroughs + playback consume-before-advance
seam and the load-bearing gapless-prefetch gate, plus the queue marker/menu so
the Queue persists when playback halts.
qbz-log crate: TeeLogger wrapping env_logger (stderr + 5000-line ring +
~/.local/share/qbz/logs/qbz.log) with write-time secret redaction (regex +
live-secret registry) and a diagnostics bundle builder.
Dev panel logs: in-app viewer that shows content the moment it opens, advanced
controls behind a discreet [+], "Copy all" as the sole footer button, a copy
button on the upload URL, and a redacted public paste upload.
Diagnostics: qbz-app::diagnostics (extracted, src-tauri untouched) feeding a
7-section panel with the live active output device + sample rate/format (pactl)
and a complete redacted report for the upload.
Report an Issue: wires the header menu item to a 1:1 Tauri modal that opens the
GitHub bug-report template.
Appearance persistence: 6 toggles that were live-only now persist via ui_prefs
+ handler arm + startup seed (window-title-show, show-volume-steppers,
sidebar-playlist-collage, local-library-track-artwork, in-app-toasts,
theme-filter).
Recommendations cache (per-tab only): TTL select 24/36/48/72h + Refresh now in
ExternalRecoView; no change to the other Discover tabs.
Bump workspace version 0.1.0 -> 1.2.15 so app_version is correct in the
diagnostics report and the QConnect About string. i18n es/de/fr/pt for all new
strings.
cc
vicrodh