Hitting TypeError: Cannot read property 'browser' of undefined and other errors

[bahmutov]

Cypress v4.10.0 and develop branch

• cloned https://github.com/bahmutov/cypress-react-unit-test (I have seen these bugs happen in other projects too)
• installed dependencies there (yarn)
• build the files (yarn build)
• opened project from cypress monorepo

$ yarn dev --project ~/git/cypress-react-unit-test

• opened a spec, for example cypress/component/advanced/mocking-axios/1-users.spec.js

The spec runs fine (I suggest keeping DevTools open)

• now hit the "Run All Tests" button multiple times quickly

And get pretty quickly to errors in the DevTools, sometimes the tests are hanging, sometimes they fail

first error: normalizeAll

Code

second error: stop

third error: Cannot read property 'browser' of undefined

Code

[jennifer-shehane]

Yah, I was able to reproduce the normalizeAll error, but didn't see the ones after. Added the build step since that was missing from descriptions.

[bahmutov]

Here is a screen recording where I am just hitting the button at different speeds and getting all 3 errors one after another.

https://www.dropbox.com/s/5o0c1ecl9uzk0fj/three-amigos.mp4?dl=0

[bahmutov]

Bonus: I could even get browser error that claimed it was from the application code

or

[jennifer-shehane]

oh yah, there are some misattributions of where errors comes from that I've seen. 😕

[cypress-bot]

The code for this is done in cypress-io/cypress#7984, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 4.11.0.

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