deepseek-ai/deepseek-harness · error · WorkflowError

SCRIPT_PARSE

SCRIPT_PARSE

Error message

workflow script does not parse: ${String(error)}

What it means

Error "workflow script does not parse: ${String(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/workflow/workflow-worker-thread/src/runtime.ts:95

    body: string,
    args: unknown,
    private readonly limits: WorkerLimits,
    private readonly observer: ExecutionObserver,
    private readonly children: ChildPort,
  ) {
    // Compile FIRST: a body syntax error must throw out of the constructor
    // before any realm state exists. The host pre-parses the identical
    // wrapper, so under one Node version this throw is unreachable in
    // production — the session still maps it to an error result defensively.
    // lineOffset compensates for the wrapper line, so stack traces carry the
    // script's own line numbers.
    try {
      this.compiled = new vm.Script(`(async () => {\n${body}\n})()`, {
        filename: `workflow:${meta.name}`,
        lineOffset: -1,
      })
    } catch (error: unknown) {
      throw new WorkflowError(`workflow script does not parse: ${String(error)}`, 'SCRIPT_PARSE', { cause: error })
    }

    this.context = vm.createContext({}, { name: `workflow:${meta.name}` })

    const globals: Record<string, unknown> = {
      agent: (prompt: unknown, opts?: unknown) => this.contain(this.agent(prompt, opts)),
      parallel: (thunks: unknown) => this.contain(this.parallel(thunks)),
      pipeline: (items: unknown, ...stages: unknown[]) => this.contain(this.pipeline(items, stages)),
      phase: (title: unknown) => { this.phase(title) },
      log: (message: unknown) => { this.log(message) },
      // workerData already performed the real cross-thread structured clone.
      args,
    }
    for (const [key, value] of Object.entries(globals)) {
      // Data properties on the contextified global; frozen shape not required —
      // a script overwriting its own hooks only sabotages itself.
      ;(this.context as Record<string, unknown>)[key] = typeof value === 'function' ? Object.freeze(value) : value
    }

View on GitHub (pinned to b150a551b8)

Solutions

1. Fix the workflow script syntax so it parses as a module; the parse error text names the offending construct.

When it happens

Trigger: Thrown at packages/workflow/workflow-worker-thread/src/runtime.ts:95 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/eaab8c0dfccf8907. Report an issue: GitHub.