deepseek-ai/deepseek-harness · error · FsError

FS_STALE_VERSION

FS_STALE_VERSION

Error message

cannot edit "${target.displayPath}": file changed since it was read

What it means

Error "cannot edit "${target.displayPath}": file changed since it was read" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/e2b/fs-e2b/src/index.ts:414

      return {
        operation: existing === undefined ? 'create' : 'update',
        version,
        before,
        after: normalizeLineEndings(content),
      }
    })
  }

  override async editText(
    target: FsTarget,
    edit: FsEditRequest,
    expected?: { version: ReturnType<typeof FsVersion> },
    signal?: AbortSignal,
  ): Promise<FsEditOutcome> {
    return this.withLock(String(target.targetKey), async () => {
      const existing = await this.probe(String(target.targetKey), target.displayPath, signal)
      if (existing === undefined) {
        throw new FsError(`cannot edit "${target.displayPath}": file changed since it was read`, 'FS_STALE_VERSION')
      }
      if (entryType(existing) !== 'file') {
        throw new FsError(`cannot edit "${target.displayPath}": not a regular file`, 'FS_NOT_REGULAR_FILE')
      }
      if (expected !== undefined && entryVersion(existing) !== expected.version) {
        throw new FsError(`cannot edit "${target.displayPath}": file changed since it was read`, 'FS_STALE_VERSION')
      }
      const raw = await this.readForEdit(target, signal)
      const before = normalizeLineEndings(raw)
      const after = literalEdit(before, edit, target.displayPath)
      const storage = restoreLineEndings(after, detectsCrlf(raw))
      const version = await this.writeAtomic(target, storage, existing, false, signal)
      return { version, before, after }
    })
  }

  private async withLock<T>(targetKey: string, operation: () => Promise<T>): Promise<T> {
    const prior = this.locks.get(targetKey) ?? Promise.resolve()

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/e2b/fs-e2b/src/index.ts:414 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/4bd74ede9a26437d. Report an issue: GitHub.