Cypress Crash: Uncaught TypeError: Cannot read properties of undefined (reading 'emit')

Current behavior

Upon finishing running my Cypress script, Cypress would crash (On Chrome Latest)

In dev tools we can see the following error:

cypress_runner.js:191727 Uncaught TypeError: Cannot read properties of undefined (reading 'emit')
    at Socket.<anonymous> (cypress_runner.js:191727)
    at Socket.../../node_modules/component-emitter/index.js.Emitter.emit (cypress_runner.js:18455)
    at Socket.emit (cypress_runner.js:199652)
    at Socket.emitEvent (cypress_runner.js:199401)
    at Socket.onevent (cypress_runner.js:199388)
    at Socket.onpacket (cypress_runner.js:199352)
    at Manager.../../node_modules/component-emitter/index.js.Emitter.emit (cypress_runner.js:18455)
    at Manager.emitReserved (cypress_runner.js:199665)
    at Manager.ondecoded (cypress_runner.js:198944)
    at Decoder.../../node_modules/component-emitter/index.js.Emitter.emit (cypress_runner.js:18455)
    at Decoder.add (cypress_runner.js:199978)
    at Manager.ondata (cypress_runner.js:198936)
    at Socket.../../node_modules/component-emitter/index.js.Emitter.emit (cypress_runner.js:18455)
    at Socket.onPacket (cypress_runner.js:196867)
    at WS.<anonymous> (cypress_runner.js:196676)
    at WS.../../node_modules/component-emitter/index.js.Emitter.emit (cypress_runner.js:18455)

Clicking on the .js line:
 lodash__WEBPACK_IMPORTED_MODULE_0___default.a.each(socketToDriverEvents, event => {
      ws.on(event, (...args) => {
        Cypress.emit(event, ...args);
      });
    });

Desired behavior

No response

Test code to reproduce

Issue seems to happen on screen redirection, not sure if its due to when a session becomes invalid. If anyone can explain what the above is related to I can investigate more before providing sample code.

Cypress Version

9.1.1

Other

No response

[hereiscasio]

I can confirm this issue existed. On my side, this is all about Cypress Component Testing.

And I think I found some clues of the bug. This bug will only happen if you install any Cypress version large than v.8.1.0 (i.e. v.8.1.0 is safe)

The issue is reproducible, and it’s easy to do:

1. Clone: https://github.com/cypress-io/cypress-component-testing-examples/tree/main/create-nuxt-app
2. update Cypress package to 8.2.0
3. run npx cypress open-ct
4. you can see the browser console show the error(see attachment)
5. but if you update Cypress to 8.1.0, no error anymore!!!

cc @bahmutov

Thx for reading. And hope this bug can be fixed.

[DobQA]

Issues still exists in Cypress 9.6, Im hoping fix comes in Cypress 10, how can we get a Cypress dev on this?