linshenkx/prompt-optimizer · error · Error

${context}: ${(lastError as Error)?.message || String(lastEr

Error message

${context}: ${(lastError as Error)?.message || String(lastError)}

What it means

Thrown at the end of the Google Drive download retry loop when the loop exits without a successful response or a thrown terminal error. The last recorded error (either an HTTP-status error or a network error from earlier attempts) is re-wrapped with the operation context and thrown, guaranteeing the caller always gets an Error when all attempts fail.

Source

Thrown at packages/ui/src/utils/remote-backup.ts:583

      if (response.ok) return response
      if (options?.returnAuthFailures && isGoogleAuthStatus(response.status)) {
        return response
      }
      if (!isRetryableHttpStatus(response.status) || attempt === GOOGLE_DRIVE_DOWNLOAD_RETRY_ATTEMPTS) {
        return assertOkResponse(response, context)
      }
      lastError = new Error(`${context}: ${response.status} ${response.statusText}`)
    } catch (error) {
      if (!isRetryableFetchError(error) || attempt === GOOGLE_DRIVE_DOWNLOAD_RETRY_ATTEMPTS) {
        throw new Error(`${context}: ${(error as Error).message || String(error)}`, { cause: error })
      }
      lastError = error
    }

    await sleep(GOOGLE_DRIVE_DOWNLOAD_RETRY_BASE_DELAY_MS * attempt)
  }

  throw new Error(`${context}: ${(lastError as Error)?.message || String(lastError)}`)
}

export const joinRemotePath = (...parts: string[]): string =>
  parts
    .map((part) => part.replace(/^\/+|\/+$/g, ''))
    .filter(Boolean)
    .join('/')

const normalizeObjectPath = (path: string): string => joinRemotePath(path)

const parentPathOf = (path: string): string => {
  const normalized = normalizeObjectPath(path)
  const index = normalized.lastIndexOf('/')
  return index === -1 ? '' : normalized.slice(0, index)
}

const fileNameOf = (path: string): string => normalizeObjectPath(path).split('/').pop() || ''

View on GitHub (pinned to 3e677b1d9f)

Solutions

1. Treat sustained retryable statuses as a provider outage: wait and retry the whole download later
2. Reduce concurrent backup operations to avoid rate limiting (429)
3. Check the provider status page for ongoing incidents
4. Increase backoff base delay or attempt count if the default budget is too small for your environment

const attemptWithBackoff = async (fn: () => Promise<ArrayBuffer>, tries = 5) => {
  for (let i = 0; i < tries; i++) {
    try { return await fn() } catch (e) { if (i === tries - 1) throw e }
    await new Promise((r) => setTimeout(r, 2 ** i * 1000))
  }
  throw new Error('unreachable')
}

When it happens

Trigger: Every retry attempt got a retryable HTTP status (e.g. repeated 500/503) until the budget ran out; or the loop completed with lastError set from a prior catch and fell through to this final throw. Functionally the 'retries exhausted with retryable HTTP failures' counterpart of error 576.

Common situations: Google Drive/S3 returning sustained 500/503 during an outage; repeated 429 rate-limiting because the backoff is too short; throttled service accounts hammering the API.

Related errors

• ${context}: ${response.status} ${message || response.statusT
• ${context}: ${(error as Error).message || String(error)}
• Anthropic API error (${error.status}): ${error.message}
• Cloudflare model search failed: ${await this.getErrorMessage
• API error: ${JSON.stringify(error.response.data)}

AI-assisted analysis of linshenkx/prompt-optimizer@3e677b1d9f (2026-08-27). Data as JSON: /api/errors/0d18a0250ad9e0af. Report an issue: GitHub.