jackwener/OpenCLI · error · CommandExecutionError

Failed to capture GeoGebra screenshot: ${err?.message || err

Error message

Failed to capture GeoGebra screenshot: ${err?.message || err}

What it means

This CommandExecutionError wraps a failure of page.screenshot() inside the `geogebra triangle` command. The construction succeeded but Playwright could not write the PNG — the wrapper preserves the underlying Playwright message for diagnosis.

Source

Thrown at clis/geogebra/triangle.js:50

    const r3 = requireGgbSuccess(await ggbEval(page, 'c=Circle(A,B)'), 'Failed to create circle c');
    results.push({ step: 'c=Circle(A,B)', result: `ok (${r3.label || 'c'})` });

    const r4 = requireGgbSuccess(await ggbEval(page, 'd=Circle(B,A)'), 'Failed to create circle d');
    results.push({ step: 'd=Circle(B,A)', result: `ok (${r4.label || 'd'})` });

    const r5 = requireGgbSuccess(await ggbEval(page, 'C=Intersect(c,d,1)'), 'Failed to create point C');
    results.push({ step: 'C=Intersect(c,d,1)', result: `ok (${r5.label || 'C'})` });

    const r6 = requireGgbSuccess(await ggbEval(page, 'Polygon(A,B,C)'), 'Failed to create triangle polygon');
    results.push({ step: 'Polygon(A,B,C)', result: `ok (${r6.label || 'triangle created'})` });

    const objectCount = await ggbWaitForObjectCount(page, 5);
    const objects = await ggbListObjects(page);
    const screenshotPath = path.join(os.tmpdir(), 'opencli-geogebra-triangle.png');
    try {
      await page.screenshot({ path: screenshotPath });
    } catch (err) {
      throw new CommandExecutionError(`Failed to capture GeoGebra screenshot: ${err?.message || err}`);
    }
    results.push({
      step: `canvas has ${objectCount} objects`,
      result: objects.map((obj) => `${obj.name}(${obj.type})`).join(', '),
    });
    results.push({ step: 'screenshot', result: screenshotPath });

    return results;
  },
});

View on GitHub (pinned to 49907e53dc)

Solutions

1. Re-run the command; transient tab races usually clear
2. Check the temp directory is writable (permissions, disk space) — screenshotPath uses os.tmpdir()/opencli-geogebra-triangle.png
3. Keep the bound tab open and on www.geogebra.org for the whole command
4. Read the appended Playwright message: 'Target closed' means re-bind the tab; filesystem errors mean fix the tmpdir

Example fix

// before
# error: Failed to capture GeoGebra screenshot: EACCES: permission denied, open '/tmp/opencli-geogebra-triangle.png'
// after
export TMPDIR=$HOME/tmp && mkdir -p $HOME/tmp && opencli geogebra triangle --a 3 --b 4 --c 5

// ensure temp dir writable before the command
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
fs.accessSync(os.tmpdir(), fs.constants.W_OK);

try {
  await run('geogebra', 'triangle', '--a', '3', '--b', '4', '--c', '5');
} catch (err) {
  if (/Failed to capture GeoGebra screenshot/.test(err.message)) {
    if (/Target closed|navigat/.test(err.message)) { await rebindTab(); return retry(); }
    if (/EACCES|ENOSPC|ENOENT/.test(err.message)) { fixTmpdirPermissions(); return retry(); }
  }
  throw err;
}

When it happens

Trigger: `geogebra triangle ...` completing its construction but failing at page.screenshot({path}) — e.g. the target tab was closed/navigated during the run, the page was destroyed, or Playwright cannot write to the temp path.

Common situations: Tab closed by user or timeout mid-command; headless browser shutdown; os.tmpdir() unwritable (permissions, full disk, read-only container); screenshot taken during navigation.

Related errors

• `Failed to capture GeoGebra screenshot: ${err?.message || er
• `Failed to inspect GeoGebra object: ${err?.message || err}`
• Verify command returned no metric for baseline
• File not found: ${path}
• File must be a readable text file: ${path}

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/b31ca1374b971e31. Report an issue: GitHub.