denoland/deno · error · Error

Bench attempted to exit with exit code

Error message

Bench attempted to exit with exit code: ${exitCode}

What it means

`deno sync-types` writes generated type config at the workspace root, so it converts `workspace().root_dir_url()` to a local filesystem path. `Url::to_file_path()` fails for any non-`file:` URL, which is mapped to this error. A workspace root becomes non-file when the resolved deno.json/workspace root itself lives at a remote URL.

Solutions

1. Use a local deno.json as the workspace/config root for sync-types
2. Vendor the remote config: download it, commit it locally, and point deno at the local copy
3. Run the command from a directory whose workspace root is on the local filesystem

Example fix

# before
$ deno sync-types --config https://example.com/deno.json
# workspace root is not a local directory

# after
$ curl -o deno.json https://example.com/deno.json
$ deno sync-types  # writes next to the local deno.json

# Ensure the workspace root is local before sync-types
CONFIG="${DENO_CONFIG:-deno.json}"
case "$CONFIG" in http*|https*) echo "remote config: vendor it locally first"; exit 1;; esac
deno sync-types

When it happens

Trigger: Running `deno sync-types` when the workspace root URL has an http(s) scheme — e.g. deno.json was discovered via a remote config URL, or the workspace root specifier is network-based — so there is no local directory to write the generated files next to the config.

Common situations: Passing a remote config (`--config https://internal.example/deno.json`) in org setups; running from an environment where the project root resolves to a URL; exotic mounts where the root cannot be expressed as a file path.

Related errors

• A deno.json file could not be found or created
• Invalid YAML
• workspace root is not a local directory
• Both 'cert' and 'key' must be provided to enable HTTPS
• Can't convert url (" ") to filename.

AI-assisted analysis of denoland/deno@9ad36f7a2c (2026-08-20). Data as JSON: /api/errors/45ae5c52b5f5c536. Report an issue: GitHub.

Appendix: source

Thrown at cli/js/40_bench.js:472

function wrapBenchmark(desc) {
  const fn = desc.fn;
  return async function outerWrapped() {
    let token = null;
    const originalConsole = globalThis.console;
    currentBenchId = desc.id;

    try {
      globalThis.console = new Console((s) => {
        op_dispatch_bench_event({ output: s });
      });

      if (desc.permissions) {
        token = pledgePermissions(desc.permissions);
      }

      if (desc.sanitizeExit) {
        setExitHandler((exitCode) => {
          throw new Error(
            `Bench attempted to exit with exit code: ${exitCode}`,
          );
        });
      }

      const context = createBenchContext(desc);
      const stats = await benchMeasure(
        fn,
        desc,
        context,
      );

      return { ok: stats };
    } catch (error) {
      return { failed: core.destructureError(error) };
    } finally {
      globalThis.console = originalConsole;
      currentBenchId = null;

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