deepseek-ai/deepseek-harness · error · Error

subprocess-e2b: truncated base64 output transport

Error message

subprocess-e2b: truncated base64 output transport

What it means

Error "subprocess-e2b: truncated base64 output transport" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/e2b/subprocess-e2b/src/output.ts:58

      if (bytes.toString('base64') !== frame) {
        throw new Error('subprocess-e2b: invalid base64 output transport')
      }
      decoded.push(bytes)
    }
    return Buffer.concat(decoded)
  }

  /**
   * Validate clean encoder completion, or discard an interrupted trailing frame after requested termination.
   * @param requireComplete - Whether natural completion requires the reserved EOF frame.
   */
  finish(requireComplete = true): void {
    if (!requireComplete) {
      this.pending = ''
      return
    }
    if (this.pending.length > 0) {
      throw new Error('subprocess-e2b: truncated base64 output transport')
    }
    if (!this.complete) throw new Error('subprocess-e2b: incomplete output transport')
  }
}

/** Offset reader used for one collect-mode E2B stream. */
export class E2BOutputReader implements SubprocessOutputReader {
  private chunks: Buffer[] = []
  private retainedBytes = 0
  private totalBytes = 0
  private spillValid = true

  /**
   * Create a bounded reader over one remote spill path.
   * @param maxBytes - In-memory tail cap.
   * @param maxSpillBytes - Maximum complete remote file size the caller accepts.
   * @param spillPath - Remote full-output path.
   */

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/e2b/subprocess-e2b/src/output.ts:58 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/926336dd8a63d197. Report an issue: GitHub.