Re: git-commit bug

> Chris Webb <chris@arachsys.com> writes:
>
>> PS Whilst experimenting, I also noticed a (presumably unintentional)
>> behaviour:
>> 
>>   $ git init .
>>   Initialized empty Git repository in /tmp/foo/.git/
>>   $ git checkout --detach
>>   $ touch bar
>>   $ git add bar
>>   $ git commit -m test
>>   [(null) (root-commit) 17b5bf9] test
>>    0 files changed
>>    create mode 100644 bar
>>   $ ls .git/refs/heads/
>>   (null)
>>   $
>> 
>> Here we've created a branch with the strange name '(null)' instead of
>> actually detaching, or refusing to detach because we're on an unborn
>> branch.
>
> This was introduced by abe199808c, which is intended to allow
>
>   git init . && git checkout --orphan newbranch
>
> but presumably wasn't also meant to enable
>
>   git checkout --orphan foo
>   git checkout --detach

> This leads to a printf("%s", NULL) and thus
>
>   $ git symbolic-ref HEAD
>   refs/heads/(null)
>
> I've followed up to this message with a patch including a test to catch this
> in future.
>
> Best wishes,
>
> Chris.