deepseek-ai/deepseek-harness · error · FsError

FS_AMBIGUOUS_EDIT

FS_AMBIGUOUS_EDIT

Error message

cannot edit "${displayPath}": old_string matched ${matches} times

What it means

Error "cannot edit "${displayPath}": old_string matched ${matches} times" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/e2b/fs-e2b/src/index.ts:165

}

function literalEdit(content: string, request: FsEditRequest, displayPath: string): string {
  const oldString = normalizeLineEndings(request.oldString)
  const newString = normalizeLineEndings(request.newString)
  if (oldString.length === 0) {
    throw new FsError(`cannot edit "${displayPath}": old_string must be non-empty`, 'FS_EDIT_NOT_FOUND')
  }
  let matches = 0
  let offset = 0
  while (true) {
    const found = content.indexOf(oldString, offset)
    if (found < 0) break
    matches += 1
    offset = found + oldString.length
  }
  if (matches === 0) throw new FsError(`cannot edit "${displayPath}": old_string was not found`, 'FS_EDIT_NOT_FOUND')
  if (!request.replaceAll && matches !== 1) {
    throw new FsError(`cannot edit "${displayPath}": old_string matched ${matches} times`, 'FS_AMBIGUOUS_EDIT')
  }
  return request.replaceAll ? content.split(oldString).join(newString) : content.replace(oldString, newString)
}

/** Remote filesystem backend sharing the sandbox owned by `ctx.e2b`. */
export class E2BFileSystem extends FileSystem {
  static inject = ['e2b']

  private readonly locks = new Map<string, Promise<unknown>>()

  override async resolve(path: string, opts?: { cwd?: string; signal?: AbortSignal }): Promise<FsTarget> {
    assertNotAborted(opts?.signal, 'resolve')
    if (path.trim().length === 0) throw new FsError('file_path must be a non-empty string', 'FS_NOT_FOUND')
    const displayPath = posix.resolve(opts?.cwd ?? this.ctx.e2b.cwd, path)
    try {
      const sandbox = await this.ctx.e2b.getSandbox()
      const targetKey = await this.canonicalPath(sandbox, displayPath, opts?.signal)
      assertNotAborted(opts?.signal, 'resolve')

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/e2b/fs-e2b/src/index.ts:165 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/d1f69638be9b1592. Report an issue: GitHub.