2

Whenever I run brew upgrade or brew cleanup I get this error in the output:

fatal: Not a valid object name develop

Although, it seems that upgrading works as expected. Where does the error come from and how to fix it?

3

It seems that the error has been caused by a misbehaving tap. After I've cleaned up taps with

brew untap <tapname>

the error disappeared.

P.S. to list all installed taps, just run:

brew tap
0

The error message comes from git - a version-control system commonly used for source code.

The error message means that you have asked git to do "something" on a name "develop" that doesn't exist yet. Typically because the branch has not been created yet, or you're targetting a repository that has been reset/cleaned or similar and the branch doesn't exist there.

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