deepseek-ai/deepseek-harness · error · FsError

FS_NOT_FOUND

FS_NOT_FOUND

Error message

offset ${request.offset} is out of range for "${displayPath}" (${acc.totalLines} lines)

What it means

Error "offset ${request.offset} is out of range for "${displayPath}" (${acc.totalLines} lines)" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/fs/tool-fs/src/read-render.ts:97

  if (acc.truncatedByBytes || acc.totalLines < request.offset || acc.lines.length >= request.limit) return

  const text = truncateLine(rawLine, request.maxLineLength)
  const bytes = lineByteSize(text, acc.lines.length)
  if (acc.outputBytes + bytes > request.maxBytes) {
    acc.truncatedByBytes = true
    return
  }
  acc.outputBytes += bytes
  acc.lines.push({ number: acc.totalLines, text })
}

function stripCarriageReturn(line: string): string {
  return line.endsWith('\r') ? line.slice(0, -1) : line
}

function finish(acc: WindowAccumulator, request: ReadWindow, displayPath: string): WindowResult {
  if (!acc.truncatedByBytes && request.offset > acc.totalLines && !(acc.totalLines === 0 && request.offset === 1)) {
    throw new FsError(`offset ${request.offset} is out of range for "${displayPath}" (${acc.totalLines} lines)`, 'FS_NOT_FOUND')
  }
  return { lines: acc.lines, totalLines: acc.totalLines, truncatedByBytes: acc.truncatedByBytes }
}

/**
 * Build one window from streamed or whole-file chunks, enforcing line and byte caps while still
 * scanning to an exact total line count, and throwing `FS_NOT_FOUND` when the requested offset is
 * past EOF.
 * @param chunks - decoded text chunks in file order; chunk boundaries carry no meaning.
 * @param request - the resolved window; the caller has already applied its defaults and caps.
 * @param displayPath - the caller-facing path used in the offset-out-of-range error.
 * @returns the numbered window lines, the total line count seen, and the byte-cap truncation flag.
 */
export async function buildWindow(
  chunks: AsyncIterable<string> | Iterable<string>,
  request: ReadWindow,
  displayPath: string,
): Promise<WindowResult> {

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/fs/tool-fs/src/read-render.ts:97 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/1f89d89b7b16b82e. Report an issue: GitHub.