Multi-project-runner fails with one project

[gaearon]

Do you want to request a feature or report a bug?

Bug.

What is the current behavior?

If I remove one of two projects in package.json, test runner gets super confused. Symptoms are similar to #4037. It's basically as if it runs without configuration at all.

What is the expected behavior?

Removing one project from projects doesn't cause the other one to fail.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

You can reproduce with this React commit: https://github.com/facebook/react/tree/171149a4b02a399a986c411b264515de45e70521.

Remove one of projects in package.json and run npm test.

[boujeepossum]

i have a fix for it but it needs some more work to do #4083

[SimenB]

Fixed in #5176

[SimenB]

Ergh, shouldn't have been closed. I don't remember why I thought it was fixed, tbh. Follow #7496 for updates as that contains a good reproduction

[github-actions]

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