deepseek-ai/deepseek-harness · error · AggregateError

PTY spawn and rollback both failed

Error message

PTY spawn and rollback both failed

What it means

Error "PTY spawn and rollback both failed" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/terminal/terminal/src/index.ts:217

      }
      let rollbackFailure: { error: unknown } | undefined
      if (session !== undefined && !this.sessions.has(sessionId)) {
        try {
          await session.close('PTY spawn rolled back')
        } catch (closeError: unknown) {
          rollbackFailure = { error: closeError }
          cleanupFailure = rollbackFailure
        }
      }
      let failure: unknown = error
      try {
        signal?.throwIfAborted()
        spawnReservation.signal.throwIfAborted()
      } catch (cancellation: unknown) {
        failure = cancellation
      }
      if (rollbackFailure !== undefined && signal?.aborted !== true) {
        throw new AggregateError([failure, rollbackFailure.error], 'PTY spawn and rollback both failed')
      }
      throw failure
    } finally {
      spawnReservation.release(cleanupFailure)
      releaseName()
    }
  }

  /**
   * Test whether an exact owner has a published session or unpublished spawn.
   * @param owner - exact live owner to inspect.
   * @returns true across the entire spawn-to-close interval, with no publication gap.
   */
  hasOwnerActivity(owner: Agent): boolean {
    return (this.pendingSpawns.get(owner)?.size ?? 0) > 0
      || [...this.sessions.values()].some(record => record.owner === owner)
  }

View on GitHub (pinned to b150a551b8)

Solutions

1. Fix the spawn failure cause first, then remove the leftover PTY resources reported by the rollback failure.

When it happens

Trigger: Thrown at packages/terminal/terminal/src/index.ts:217 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/aff74e38c7f8eb69. Report an issue: GitHub.