paperclipai/paperclip · error

Daytona syncOut refusing unparseable or ambiguous symlink en

Error message

Daytona syncOut refusing unparseable or ambiguous symlink entry: ${line}

What it means

Fail-closed check in assertTarballEntriesConfined: a tar member whose type flag is 'l' (symlink) did not split cleanly on exactly one ' -> ' separator, so its name and link target are ambiguous. Since the target cannot be verified to stay inside the extraction dir, the syncOut is refused outright.

Source

Thrown at packages/plugins/sandbox-providers/daytona/src/file-sync.ts:251

 * targets are inspected; any unparseable line fails closed.
 */
async function assertTarballEntriesConfined(archivePath: string): Promise<void> {
  const { stdout } = await execFileAsync("tar", ["-tvf", archivePath], {
    env: { ...process.env, COPYFILE_DISABLE: "1" },
    maxBuffer: 32 * 1024 * 1024,
  });
  const lines = stdout.split("\n").filter((line) => line.trim().length > 0);
  for (const line of lines) {
    const parsed = parseTarVerboseListingLine(line);
    if (!parsed) {
      throw new Error(`Daytona syncOut refusing tarball with an unparseable entry listing: ${line}`);
    }
    const typeFlag = parsed.typeFlag;
    let name = parsed.rest;
    let linkTarget: string | null = null;
    if (typeFlag === "l") {
      const split = splitLinkEntryOnce(name, " -> ");
      if (!split) throw new Error(`Daytona syncOut refusing unparseable or ambiguous symlink entry: ${line}`);
      name = split.name;
      linkTarget = split.target;
    } else if (typeFlag === "h") {
      const split = splitLinkEntryOnce(name, " link to ");
      if (!split) throw new Error(`Daytona syncOut refusing unparseable or ambiguous hardlink entry: ${line}`);
      name = split.name;
      linkTarget = split.target;
    }
    const cleanName = name.replace(/\/+$/, "");
    if (cleanName.length > 0 && posixPathEscapes(cleanName)) {
      throw new Error(`Daytona syncOut refusing tarball member that escapes the extraction dir: ${name}`);
    }
    if (linkTarget !== null) {
      const resolved = path.posix.join(path.posix.dirname(cleanName), linkTarget);
      if (path.posix.isAbsolute(linkTarget) || posixPathEscapes(resolved)) {
        throw new Error(
          `Daytona syncOut refusing tarball link whose target escapes the extraction dir: ${name} -> ${linkTarget}`,
        );

View on GitHub (pinned to a7e689b3c3)

Solutions

1. Fix or exclude the ambiguous symlink entry in the tarball.

When it happens

Trigger: Thrown at packages/plugins/sandbox-providers/daytona/src/file-sync.ts:247 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of paperclipai/paperclip@a7e689b3c3 (2026-08-18). Data as JSON: /api/errors/cfda5e0ac93cdf50. Report an issue: GitHub.