What causes "[sc-download-store] listen bulk failed" in tonhowtf/omniget?

Inspect the logged err for the listen() failure cause.

[sc-download-store] listen bulk failed

Error message

[sc-download-store] listen bulk failed

What it means

Logged in download-store.start() when registering the listener for `study-soundcloud-download-bulk-progress` fails. Bulk/batch download progress events are then never delivered, so batch progress UI freezes even though downloads continue in the backend. Non-fatal.

Solutions

Inspect the logged err for the listen() failure cause.
Guard start() to run only in the Tauri webview environment.
Verify the Rust side emits exactly `study-soundcloud-download-bulk-progress`.
Avoid calling start() during unmount; tie listener lifecycle to mounted state.
Retry registration with backoff and show an indeterminate bulk-progress state on failure.

Example fix

// before
} catch (err) {
  console.warn("[sc-download-store] listen bulk failed", err);
}
// after
} catch (err) {
  console.warn("[sc-download-store] listen bulk failed", err);
  this.bulkProgressAvailable = false;
  scheduleRetry(() => this.start());
}

Defensive patterns

Strategy: retry

Validate before calling

if (!isTauri()) return;

Type guard

function isTauri(): boolean {
  return typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
}

Try / catch

try {
  const bulk = await listen<BulkPayload>("study-soundcloud-download-bulk-progress", (e) => this.handleBulk(e.payload));
  this.listeners.push(bulk);
} catch (err) {
  console.warn("[sc-download-store] listen bulk failed", err);
  scheduleRetry(() => this.start());
}

Prevention

Tie listener lifecycle to component mount/unmount, not ad-hoc start/stop.
Avoid start()/stop() races with an idempotent started flag.
Verify the Rust emitter uses the exact bulk event name.
Provide an indeterminate UI state when bulk progress listeners are down.

When it happens

Trigger: Calling start() when listen("study-soundcloud-download-bulk-progress") rejects: no Tauri event API (browser dev), webview teardown in progress, or event system error.

Common situations: Browser dev mode; start() racing with stop() during component unmount; Tauri event plugin not initialized; event name mismatch with the Rust emitter.

Related errors

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/c5b1dd97c557cfe4. Report an issue: GitHub.

Appendix: source

Thrown at src/lib/study-music/download-store.svelte.ts:105

    this.started = true;
    void (async () => {
      try {
        const single = await listen<SinglePayload>(
          "study-soundcloud-download-progress",
          (e) => this.handleSingle(e.payload),
        );
        this.listeners.push(single);
      } catch (err) {
        console.warn("[sc-download-store] listen single failed", err);
      }
      try {
        const bulk = await listen<BulkPayload>(
          "study-soundcloud-download-bulk-progress",
          (e) => this.handleBulk(e.payload),
        );
        this.listeners.push(bulk);
      } catch (err) {
        console.warn("[sc-download-store] listen bulk failed", err);
      }
    })();
  }

  stop() {
    for (const u of this.listeners) {
      try {
        u();
      } catch {
        /* ignore */
      }
    }
    this.listeners = [];
    this.started = false;
  }

  private handleSingle(p: SinglePayload) {
    if (typeof p.job_id !== "number") return;

View on GitHub (pinned to 8600b91f42)