deepseek-ai/deepseek-harness · error · FsError

FS_NOT_OBSERVED

FS_NOT_OBSERVED

Error message

cannot overwrite existing "${displayPath}" without reading it first

What it means

Error "cannot overwrite existing "${displayPath}" without reading it first" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/fs/fs-local/src/fsio.ts:502

  displayPath: string,
  inspectPublicationTarget: (path: string) => Promise<BigIntStats>,
): Promise<never> {
  let existing: BigIntStats | undefined
  try {
    existing = await inspectPublicationTarget(absolutePath)
  } catch (metadataError: unknown) {
    if (!isENOENT(metadataError) && !isENOTDIR(metadataError)) {
      throw new FsError(`cannot write "${displayPath}": ${errorMessage(metadataError)}`, 'FS_IO_ERROR', { cause: metadataError })
    }
  }

  // Link errno values vary by platform and filesystem. Inspect the target entry
  // after failure so a collision is not confused with missing hard-link support.
  if (existing !== undefined) {
    if (!existing.isFile()) {
      throw new FsError(`cannot write "${displayPath}": not a regular file`, 'FS_NOT_REGULAR_FILE', { cause: error })
    }
    throw new FsError(
      `cannot overwrite existing "${displayPath}" without reading it first`,
      'FS_NOT_OBSERVED',
      { cause: error },
    )
  }
  if (isEEXIST(error)) {
    throw new FsError(
      `cannot overwrite existing "${displayPath}" without reading it first`,
      'FS_NOT_OBSERVED',
      { cause: error },
    )
  }
  throw new FsError(`cannot write "${displayPath}": ${errorMessage(error)}`, 'FS_IO_ERROR', { cause: error })
}

/**
 * Atomically replace a file through a private, synced staging file in the same directory.
 * POSIX protects the staging directory and file with `0o700` and `0o600`. A new Windows file

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/fs/fs-local/src/fsio.ts:502 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/fdb42186a8e91c5d. Report an issue: GitHub.