Unable to create PR due to "Validation failed: must be a collaborator"

[jtbandes]

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(More context: qchateau/conan-center-bot#111)

There is a bot (conan-center-bot) that pushes branches to a fork of conan-center/conan-center-index.

As a third party (neither the owner of the upstream repo nor the owner of the fork) I can visit this page, and click a link to open a PR for one of these branches. For example: https://github.com/qchateau/conan-center-index/pull/new/ccb-mcap-1.2.0

This redirects me to the "compare" page at https://github.com/conan-io/conan-center-index/compare/master...qchateau:conan-center-index:ccb-mcap-1.2.0?expand=1

However, when I click "Create pull request", I get this error:

What's going on here? Is this a new requirement? Is it controlled by some repo settings, either on the original upstream repo or on the fork? The error message doesn't provide enough information to find any more info in the docs.

[Zudjo]

I have this problem too. Did you manage to solve it?

[jtbandes]

Nope!

[a4z]

same situation here, please see
cross-language-cpp/djinni-generator#154

any idea what we could do?

[Zudjo]

I managed to "resolve" this.

I'm not sure if this was the case for you too, but I got this error because i was trying to make a pull request directly from github, without passing from the cloned repo.

[a4z]

Thanks for the info!
I can not say what our problem was, since it was not my problem, but from the person who wanted to create a PR to out repo.

[vient]

Stumbled into same problem - ended up making my fork of base repository, opening an outside commit there, creating new branch from it (enter new branch name, github will ask if you want to create a new branch from this commit), and finally creating pull request from this new branch.

Guess the easier way would be to fork derived repository where needed branch already exists, and then create a pull request from it.