deepseek-ai/deepseek-harness · error

${String(unusable.length)} row(s) did not activate: ${unusab

Error message

${String(unusable.length)} row(s) did not activate:
${unusable.join('\n')}

What it means

Error "${String(unusable.length)} row(s) did not activate: ${unusable.join('\n')}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/preset/agent-presets/src/mount.ts:359

  // Captured before the subtree exists: the standing scope context still
  // carries the host composition's base, which is inside the installed
  // harness and is therefore where a row's package name has to resolve from.
  /* v8 ignore next -- the Loader sets `baseUrl` on the root before any scoped context derives from it */
  if (agentCtx.baseUrl !== undefined) harnessBase.set(config, agentCtx.baseUrl)
  // Before the record this mount is about to add: standing mounts are one per
  // preset and live until whole-tree teardown, so pruning here only sweeps
  // records of torn-down runtimes (tests; an HMR reload of the roster).
  pruneDisposedMounts()
  const handle = agentCtx.plugin(PresetTree, config)
  try {
    await handle.await()
    const subtree = mounted.get(config)
    /* v8 ignore next -- the subclass constructor runs before `await()` settles for every mounted tree */
    if (subtree === undefined) throw new Error('mounted subtree did not publish its entry tree')
    const { tree, fiber } = subtree
    const unusable = inactiveRows(tree)
    if (unusable.length > 0) {
      throw new Error(`${String(unusable.length)} row(s) did not activate:\n${unusable.join('\n')}`)
    }
    const leaked = leakedServices(agentCtx, fiber)
    if (leaked.length > 0) {
      throw new Error(
        `row(s) published process-global service(s) [${leaked.join(', ')}]; `
        + 'a preset service must sit behind an `isolate` realm or move to the host composition',
      )
    }
    mounts.add({ presetId: preset.id, fiber, key: scopeOf(agentCtx) })
  } catch (error) {
    try {
      await handle.dispose()
    /* v8 ignore next 5 -- teardown of a subtree nothing else references has no
       observed failure mode; the guard exists so a teardown error cannot
       replace the mount diagnostic the caller needs. */
    } catch {
      // Swallows only this subtree's teardown failure. The mount error below is
      // the actionable one, and the discarded fiber is unreachable either way.

View on GitHub (pinned to b150a551b8)

Solutions

1. Fix each listed row per its stated reason, then mount again.

When it happens

Trigger: Thrown at packages/preset/agent-presets/src/mount.ts:359 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/b39f11d2c28797c8. Report an issue: GitHub.