jackwener/OpenCLI · error · ArgumentError

twitter followers user cannot be empty

Error message

twitter followers user cannot be empty

What it means

A final defensive check after both the explicit user argument and profile-link resolution paths: if targetUser is still falsy, the command refuses to navigate to '/undefined/followers' and throws ArgumentError with a usage example. In practice this is hard to reach because the earlier branches throw first — it protects against normalizeScreenName returning a falsy value that slipped through both prior guards (e.g. rawUser empty and href branch somehow skipped normalization).

Source

Thrown at clis/twitter/followers.js:128

        }

        if (!targetUser) {
            // Bridge wraps primitive page.evaluate returns as { session, data:<value> };
            // unwrap so the href string is usable downstream.
            const href = unwrapBrowserResult(await page.evaluate(`() => {
                const link = document.querySelector('a[data-testid="AppTabBar_Profile_Link"]');
                return link ? link.getAttribute('href') : null;
            }`));
            if (!href || typeof href !== 'string') {
                throw new AuthRequiredError('x.com', 'Could not find logged-in user profile link. Are you logged in?');
            }
            targetUser = normalizeScreenName(href);
            if (!targetUser) {
                throw new AuthRequiredError('x.com', 'Could not find logged-in user profile link. Are you logged in?');
            }
        }
        if (!targetUser) {
            throw new ArgumentError('twitter followers user cannot be empty', 'Example: opencli twitter followers @elonmusk --limit 100');
        }

        await page.installInterceptor('/Followers?');
        const targetPath = `/${targetUser}/followers`;
        await page.evaluate(`() => {
            const targetPath = ${JSON.stringify(targetPath)};
            window.history.pushState({}, '', targetPath);
            window.dispatchEvent(new PopStateEvent('popstate', { state: {} }));
        }`);
        try {
            await page.waitForCapture(CAPTURE_TIMEOUT_SECONDS);
        }
        catch {
            throw new TimeoutError('twitter followers API capture', CAPTURE_TIMEOUT_SECONDS, 'No Followers response was observed after opening the followers list.');
        }
        const currentPath = unwrapBrowserResult(await page.evaluate('() => window.location.pathname'));
        if (typeof currentPath !== 'string' || !currentPath.toLowerCase().endsWith('/followers')) {
            throw new CommandExecutionError('SPA navigation to Twitter followers failed');

View on GitHub (pinned to 49907e53dc)

Solutions

1. Supply the user argument explicitly: opencli twitter followers @handle
2. Ensure normalizeTwitterScreenName in shared.js returns a non-empty handle for valid input
3. Verify you are calling the command with a non-empty, valid handle

Example fix

// before
opencli twitter followers "   "
// after
opencli twitter followers @elonmusk --limit 100

const target = (raw ?? '').trim();
if (!/^@?[A-Za-z0-9_]{1,15}$/.test(target)) throw new Error('supply a handle, e.g. @elonmusk');

const hasTarget = (s) => typeof s === 'string' && s.trim().length > 0;

try {
  await opencli.twitter.followers(user);
} catch (err) {
  if (err.message.includes('cannot be empty')) {
    return opencli.twitter.followers(defaultHandle);
  } else throw err;
}

When it happens

Trigger: Reached only if kwargs.user is empty/whitespace AND the profile-link branch did not set targetUser (future code changes, or normalizeScreenName returning an empty string from an unexpected href without throwing at 4104/4105).

Common situations: Mostly defensive dead code today; can surface in forks or modified versions of the command where the earlier AuthRequiredError guards were removed or altered.

Related errors

• ${label} is required
• ${label} must be a positive integer
• ${label} must be <= ${maxValue}
• arxiv ${label} must be a positive integer
• arxiv ${label} must be <= ${maxValue}

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/e8a00df532746127. Report an issue: GitHub.