client-modules: duplicate factory registration for "${regist

Error message

client-modules: duplicate factory registration for "${registration.id}" (bundle executed twice without invalidate?)

What it means

Error "client-modules: duplicate factory registration for "${registration.id}" (bundle executed twice without invalidate?)" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/client/modules/src/client/system.ts:107

    })

    const target = options.registrationTarget
    if (target.mode !== 'queue') {
      throw new Error('client-modules: window.__ModuleLoader__.create called after module-system boot')
    }
    const pending = target.pendingQueue.splice(0)
    // Switch first: a bundle that executes while pending registrations drain
    // must register live rather than append behind the drain.
    target.mode = 'live'
    target.load = (registration) => { this.register(registration) }
    for (const registration of pending) target.load(registration)
  }

  /** Register one bundle factory, rejecting a script that executes twice without invalidation. */
  private register(registration: ClientBundleRegistration): void {
    const id = stripClientSuffix(registration.id)
    if (this.bootstrapIds.has(id) || this.factories.has(id)) {
      throw new Error(`client-modules: duplicate factory registration for "${registration.id}" (bundle executed twice without invalidate?)`)
    }
    this.factories.set(id, registration.factory)
  }

  /** Load one graph row so its factory is registered (idempotent per in-flight arrival). */
  private arrive(row: BootModuleRow): Promise<void> {
    const { id, url } = row
    const pending = this.pendingArrival.get(id)
    if (pending !== undefined) return pending
    if (this.loadCache.has(id) || this.factories.has(id)) return Promise.resolve()
    const task = this.loadBundle(url).then(() => {
      if (!this.factories.has(id)) {
        throw new Error(`client-modules: bundle ${url} loaded without registering "${id}" via __ModuleLoader__.load`)
      }
    }).finally(() => { this.pendingArrival.delete(id) })
    this.pendingArrival.set(id, task)
    return task
  }

View on GitHub (pinned to b150a551b8)

Solutions

Invalidate the module before re-executing its bundle; avoid executing the bundle twice.

When it happens

Trigger: Thrown at packages/client/modules/src/client/system.ts:107 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/069afb1f66dcc12c. Report an issue: GitHub.