CSS.enable with request interceptor stops execution

Hello. I found an error while recording coverage and tracing data. The puppeteer stops at the CDP call “CSS.enable” and cannot continue execution if the request interceptor was previously enabled.

Code to reproduce the bug:

const puppeteer = require('puppeteer');

const test = async () => {
  const browser = await puppeteer.launch({});
  const page = await browser.newPage();

  // if you remove the interceptor, the bug will not be reproduced
  await page.setRequestInterception(true);
  page.on('request', (interceptedRequest) => {
    interceptedRequest.continue();
  });

  await page.tracing.start({});
  await page.coverage.startCSSCoverage(); // <-- stayed here
  
  await page.goto('https://google.com');

  await page.coverage.stopCSSCoverage();
  await page.tracing.stop();
};

test();

• Puppeteer version: 2.0.0
• Platform / OS version: Windows 10 or MacOS 10.14.6
• Node.js version: 10.15.1, 12.13.0

[pyatyispyatil]

Yes, this workaround works. But in my case, I want to use coverage more than once on one page.

[stale[bot]]

We are closing this issue. If the issue still persists in the latest version of Puppeteer, please reopen the issue and update the description. We will try our best to accomodate it!