denoland/deno · error

URL has no resolvable mirror path: {url}

Error message

URL has no resolvable mirror path: {url}

What it means

Error "URL has no resolvable mirror path: {url}" thrown in denoland/deno.

Source

Thrown at cli/tools/installer/npm_compat.rs:1293

      {
        queue.push_back(child);
      }
    }
  }

  Ok(paths)
}

/// Write `bytes` to the local mirror file for `url`, returning the path
/// relative to `.deno/` (suitable for tsconfig `paths`).
fn write_mirror(
  remote_root: &Path,
  url: &Url,
  bytes: &[u8],
  type_check_remote: bool,
) -> Result<String, AnyError> {
  let local_path = url_to_local_path(remote_root, url)
    .ok_or_else(|| anyhow!("URL has no resolvable mirror path: {url}"))?;
  if let Some(parent) = local_path.parent() {
    std::fs::create_dir_all(parent)?;
  }
  // Mark mirrored script modules `// @ts-nocheck`. Remote dependencies are not
  // the user's code and Deno itself doesn't re-type-check them; without this,
  // stock tsc/tsgo would report every type error inside the dependency (which
  // dwarfs the project's own diagnostics). `@ts-nocheck` suppresses errors in
  // the file while keeping its exported and ambient types available to
  // importers, and triple-slash directives (which may follow a leading comment)
  // still apply. Skipped under `deno check --all`, which does type-check remote
  // modules.
  let is_script = matches!(
    local_path.extension().and_then(|e| e.to_str()),
    Some("ts" | "tsx" | "mts" | "cts" | "js" | "jsx" | "mjs" | "cjs")
  );
  if is_script && !type_check_remote {
    let mut content = Vec::with_capacity(bytes.len() + 16);
    content.extend_from_slice(b"// @ts-nocheck\n");

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at cli/tools/installer/npm_compat.rs:1293 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/a18622ab99746401. Report an issue: GitHub.