`git remote set-branches (without --add) <name> <branch>…​` does not add refspecs to `remote.<remote>.fetch` when `remote.<remote>.fetch` does not exist

> cd '/'; cd '/'; rm --force --recursive -- './test_git'; mkdir "$_"; cd "$_";
> mkdir --parents -- './server' './client';
> git -C './client' init './repo'
> git -C './client/repo' remote --verbose
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote add server 'file://'"$(realpath
> './server/repo.git')"
> git -C './client/repo' remote --verbose
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches server branch1 branch2
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches --add server branch3 branch4
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches --add server branch3 branch4
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches server
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches server branch1 branch2
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches --add server branch3 branch4
> git -C './client/repo' config list --local --show-scope --show-origin
> git -C './client/repo' remote set-branches --add server branch3 branch4
> git -C './client/repo' config list --local --show-scope --show-origin
> 
> What did you expect to happen? (Expected behavior)
> 
> (local config has branch1 and branch2:)
> remote.server.fetch=+refs/heads/branch1:refs/remotes/server/branch1
> remote.server.fetch=+refs/heads/branch2:refs/remotes/server/branch2
> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> 
> What happened instead? (Actual behavior)
> 
> (local config does not have branch1 and branch2:)
> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> 
> What's different between what you expected and what actually happened?
> 
> Anything else you want to add:
> 
> Please review the rest of the bug report below.
> You can delete any lines you don't wish to share.
> 
> 
> [System Info]
> git version:
> git version 2.46.0.windows.1
> cpu: x86_64
> built from commit: 2e6a859ffc0471f60f79c1256f766042b0d5d17d
> sizeof-long: 4
> sizeof-size_t: 8
> shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
> feature: fsmonitor--daemon
> libcurl: 8.9.0
> OpenSSL: OpenSSL 3.2.2 4 Jun 2024
> zlib: 1.3.1
> uname: Windows 10.0 22631
> compiler info: gnuc: 14.1
> libc info: no libc information available
> $SHELL (typically, interactive shell): C:\Program Files\Git\usr\bin\bash.exe
> 
> 
> [Enabled Hooks]
> not run from a git repository - no hooks to show
> 

>
> On 03/09/2024 11:37, Han Jiang wrote:
> > Thank you for filling out a Git bug report!
> > Please answer the following questions to help us understand your issue.
> >
> > What did you do before the bug happened? (Steps to reproduce your issue)
>
> It is always helpful to show how to reproduce a bug but please try and
> aim for a minimal reproduction recipe. It is much easier to follow if
> you show which output lines come from which command. In this case one
> can reproduce the issue with
>
> $ git remote add test git@example.com
> $ git config --get-all remote.test.fetch
> +refs/heads/*:refs/remotes/test/*
> $ git config --unset-all remote.test.fetch
> $ git config --get-all remote.test.fetch
> $ git remote set-branches test main topic
> $ git config --get-all remote.test.fetch
>
> I haven't looked into what causes this. I wonder how likely users are to
> be affected - how did you get into a state where there was no fetch
> refspec set for your remote?
>
> Best Wishes
>
> Phillip
>
> > cd '/'; cd '/'; rm --force --recursive -- './test_git'; mkdir "$_"; cd "$_";
> > mkdir --parents -- './server' './client';
> > git -C './client' init './repo'
> > git -C './client/repo' remote --verbose
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote add server 'file://'"$(realpath
> > './server/repo.git')"
> > git -C './client/repo' remote --verbose
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches server branch1 branch2
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches --add server branch3 branch4
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches --add server branch3 branch4
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches server
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches server branch1 branch2
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches --add server branch3 branch4
> > git -C './client/repo' config list --local --show-scope --show-origin
> > git -C './client/repo' remote set-branches --add server branch3 branch4
> > git -C './client/repo' config list --local --show-scope --show-origin
> >
> > What did you expect to happen? (Expected behavior)
> >
> > (local config has branch1 and branch2:)
> > remote.server.fetch=+refs/heads/branch1:refs/remotes/server/branch1
> > remote.server.fetch=+refs/heads/branch2:refs/remotes/server/branch2
> > remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> > remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> > remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> > remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >
> > What happened instead? (Actual behavior)
> >
> > (local config does not have branch1 and branch2:)
> > remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> > remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> > remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> > remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >
> > What's different between what you expected and what actually happened?
> >
> > Anything else you want to add:
> >
> > Please review the rest of the bug report below.
> > You can delete any lines you don't wish to share.
> >
> >
> > [System Info]
> > git version:
> > git version 2.46.0.windows.1
> > cpu: x86_64
> > built from commit: 2e6a859ffc0471f60f79c1256f766042b0d5d17d
> > sizeof-long: 4
> > sizeof-size_t: 8
> > shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
> > feature: fsmonitor--daemon
> > libcurl: 8.9.0
> > OpenSSL: OpenSSL 3.2.2 4 Jun 2024
> > zlib: 1.3.1
> > uname: Windows 10.0 22631
> > compiler info: gnuc: 14.1
> > libc info: no libc information available
> > $SHELL (typically, interactive shell): C:\Program Files\Git\usr\bin\bash.exe
> >
> >
> > [Enabled Hooks]
> > not run from a git repository - no hooks to show
> >

> After that, `git remote set-branches <remote>
> <branch>…` does not work. (But `git remote set-branches --add` can be
> used to get out of the corrupted state.)
> 
> Shortened version of the example:
> git remote add server git@example.com
> git config list --local
> git remote set-branches server
> git config list --local
> git remote set-branches server branch1 branch2
> git config list --local
> 
> On Thu, Sep 5, 2024 at 9:07 PM Phillip Wood <phillip.wood123@gmail.com> wrote:
>>
>> On 03/09/2024 11:37, Han Jiang wrote:
>>> Thank you for filling out a Git bug report!
>>> Please answer the following questions to help us understand your issue.
>>>
>>> What did you do before the bug happened? (Steps to reproduce your issue)
>>
>> It is always helpful to show how to reproduce a bug but please try and
>> aim for a minimal reproduction recipe. It is much easier to follow if
>> you show which output lines come from which command. In this case one
>> can reproduce the issue with
>>
>> $ git remote add test git@example.com
>> $ git config --get-all remote.test.fetch
>> +refs/heads/*:refs/remotes/test/*
>> $ git config --unset-all remote.test.fetch
>> $ git config --get-all remote.test.fetch
>> $ git remote set-branches test main topic
>> $ git config --get-all remote.test.fetch
>>
>> I haven't looked into what causes this. I wonder how likely users are to
>> be affected - how did you get into a state where there was no fetch
>> refspec set for your remote?
>>
>> Best Wishes
>>
>> Phillip
>>
>>> cd '/'; cd '/'; rm --force --recursive -- './test_git'; mkdir "$_"; cd "$_";
>>> mkdir --parents -- './server' './client';
>>> git -C './client' init './repo'
>>> git -C './client/repo' remote --verbose
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote add server 'file://'"$(realpath
>>> './server/repo.git')"
>>> git -C './client/repo' remote --verbose
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches server branch1 branch2
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches --add server branch3 branch4
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches --add server branch3 branch4
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches server
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches server branch1 branch2
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches --add server branch3 branch4
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>> git -C './client/repo' remote set-branches --add server branch3 branch4
>>> git -C './client/repo' config list --local --show-scope --show-origin
>>>
>>> What did you expect to happen? (Expected behavior)
>>>
>>> (local config has branch1 and branch2:)
>>> remote.server.fetch=+refs/heads/branch1:refs/remotes/server/branch1
>>> remote.server.fetch=+refs/heads/branch2:refs/remotes/server/branch2
>>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
>>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
>>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
>>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
>>>
>>> What happened instead? (Actual behavior)
>>>
>>> (local config does not have branch1 and branch2:)
>>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
>>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
>>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
>>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
>>>
>>> What's different between what you expected and what actually happened?
>>>
>>> Anything else you want to add:
>>>
>>> Please review the rest of the bug report below.
>>> You can delete any lines you don't wish to share.
>>>
>>>
>>> [System Info]
>>> git version:
>>> git version 2.46.0.windows.1
>>> cpu: x86_64
>>> built from commit: 2e6a859ffc0471f60f79c1256f766042b0d5d17d
>>> sizeof-long: 4
>>> sizeof-size_t: 8
>>> shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
>>> feature: fsmonitor--daemon
>>> libcurl: 8.9.0
>>> OpenSSL: OpenSSL 3.2.2 4 Jun 2024
>>> zlib: 1.3.1
>>> uname: Windows 10.0 22631
>>> compiler info: gnuc: 14.1
>>> libc info: no libc information available
>>> $SHELL (typically, interactive shell): C:\Program Files\Git\usr\bin\bash.exe
>>>
>>>
>>> [Enabled Hooks]
>>> not run from a git repository - no hooks to show
>>>

>
> On 05/09/2024 23:24, Han Jiang wrote:
> > A way to get into the state is `git remote set-branches <remote>`
> > (followed by zero <branch>es), which removes `remote.server.fetch`
> > configuration variable.
>
> Oh, I wonder if that is a feature or a bug? I see we don't sanity check
> the branch name either so we'll happily create refspecs containing any
> old rubbish. I'll send a patch series that fixes the original bug and
> checks the branch names later this week.
>
> Best Wishes
>
> Phillip
>
> > After that, `git remote set-branches <remote>
> > <branch>…` does not work. (But `git remote set-branches --add` can be
> > used to get out of the corrupted state.)
> >
> > Shortened version of the example:
> > git remote add server git@example.com
> > git config list --local
> > git remote set-branches server
> > git config list --local
> > git remote set-branches server branch1 branch2
> > git config list --local
> >
> > On Thu, Sep 5, 2024 at 9:07 PM Phillip Wood <phillip.wood123@gmail.com> wrote:
> >>
> >> On 03/09/2024 11:37, Han Jiang wrote:
> >>> Thank you for filling out a Git bug report!
> >>> Please answer the following questions to help us understand your issue.
> >>>
> >>> What did you do before the bug happened? (Steps to reproduce your issue)
> >>
> >> It is always helpful to show how to reproduce a bug but please try and
> >> aim for a minimal reproduction recipe. It is much easier to follow if
> >> you show which output lines come from which command. In this case one
> >> can reproduce the issue with
> >>
> >> $ git remote add test git@example.com
> >> $ git config --get-all remote.test.fetch
> >> +refs/heads/*:refs/remotes/test/*
> >> $ git config --unset-all remote.test.fetch
> >> $ git config --get-all remote.test.fetch
> >> $ git remote set-branches test main topic
> >> $ git config --get-all remote.test.fetch
> >>
> >> I haven't looked into what causes this. I wonder how likely users are to
> >> be affected - how did you get into a state where there was no fetch
> >> refspec set for your remote?
> >>
> >> Best Wishes
> >>
> >> Phillip
> >>
> >>> cd '/'; cd '/'; rm --force --recursive -- './test_git'; mkdir "$_"; cd "$_";
> >>> mkdir --parents -- './server' './client';
> >>> git -C './client' init './repo'
> >>> git -C './client/repo' remote --verbose
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote add server 'file://'"$(realpath
> >>> './server/repo.git')"
> >>> git -C './client/repo' remote --verbose
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches server branch1 branch2
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches --add server branch3 branch4
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches --add server branch3 branch4
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches server
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches server branch1 branch2
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches --add server branch3 branch4
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>> git -C './client/repo' remote set-branches --add server branch3 branch4
> >>> git -C './client/repo' config list --local --show-scope --show-origin
> >>>
> >>> What did you expect to happen? (Expected behavior)
> >>>
> >>> (local config has branch1 and branch2:)
> >>> remote.server.fetch=+refs/heads/branch1:refs/remotes/server/branch1
> >>> remote.server.fetch=+refs/heads/branch2:refs/remotes/server/branch2
> >>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> >>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> >>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >>>
> >>> What happened instead? (Actual behavior)
> >>>
> >>> (local config does not have branch1 and branch2:)
> >>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> >>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >>> remote.server.fetch=+refs/heads/branch3:refs/remotes/server/branch3
> >>> remote.server.fetch=+refs/heads/branch4:refs/remotes/server/branch4
> >>>
> >>> What's different between what you expected and what actually happened?
> >>>
> >>> Anything else you want to add:
> >>>
> >>> Please review the rest of the bug report below.
> >>> You can delete any lines you don't wish to share.
> >>>
> >>>
> >>> [System Info]
> >>> git version:
> >>> git version 2.46.0.windows.1
> >>> cpu: x86_64
> >>> built from commit: 2e6a859ffc0471f60f79c1256f766042b0d5d17d
> >>> sizeof-long: 4
> >>> sizeof-size_t: 8
> >>> shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
> >>> feature: fsmonitor--daemon
> >>> libcurl: 8.9.0
> >>> OpenSSL: OpenSSL 3.2.2 4 Jun 2024
> >>> zlib: 1.3.1
> >>> uname: Windows 10.0 22631
> >>> compiler info: gnuc: 14.1
> >>> libc info: no libc information available
> >>> $SHELL (typically, interactive shell): C:\Program Files\Git\usr\bin\bash.exe
> >>>
> >>>
> >>> [Enabled Hooks]
> >>> not run from a git repository - no hooks to show
> >>>