deepseek-ai/deepseek-harness · error

workflow: ${name} listener threw: ${renderListenerError(erro

Error message

workflow: ${name} listener threw: ${renderListenerError(error)}

What it means

Error "workflow: ${name} listener threw: ${renderListenerError(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/workflow/workflow/src/index.ts:183

   *   optional cancel signal.
   * @returns the live run; its `result` resolves when the script settles.
   */
  abstract start(request: WorkflowStartRequest): WorkflowRun

  /**
   * Emit a lifecycle event while containing and logging each listener failure.
   * @param name - the `workflow/*` event to dispatch.
   * @param args - the event's payload, matching its declared signature.
   */
  protected emitWorkflowEvent(name: WorkflowEventName, ...args: unknown[]): void {
    for (const callback of this.ctx.events.dispatch('emit', [name, ...args])) {
      try {
        const returned: unknown = (callback as (...payload: unknown[]) => unknown)(...args)
        void Promise.resolve(returned).catch((error: unknown) => {
          this.ctx.logger.warn(`workflow: ${name} listener rejected: ${renderListenerError(error)}`)
        })
      } catch (error: unknown) {
        this.ctx.logger.warn(`workflow: ${name} listener threw: ${renderListenerError(error)}`)
      }
    }
  }
}

/**
 * Render any thrown value without violating listener containment.
 * @param error - any thrown value.
 * @returns `String(error)`, or a fixed label when even coercion throws.
 */
function renderListenerError(error: unknown): string {
  try {
    return String(error)
  } catch {
    // String coercion itself may throw.
    return '[unrenderable thrown value]'
  }
}

View on GitHub (pinned to b150a551b8)

Solutions

1. Fix the exception in the named workflow listener.

When it happens

Trigger: Thrown at packages/workflow/workflow/src/index.ts:183 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/51d600d4948a56af. Report an issue: GitHub.