Q: warning: unable to rmdir 'submodule': Directory not empty

> Hi!
> 
> I wonder whether you'd think this is a bug:
> When a branch uses a submodule (named "submodule" here), and when you 
> checkout another branch that does not (yet) have that submodule, I get an 
> error message saying:
> warning: unable to rmdir 'submodule': Directory not empty
> 
> Well obviously the directory is not empty. The point is: Is the user 
> expected to remove submodule directories manually before switching branches?
> 
> When I tried "git checkout master --recurse-submodules" instead, the 
> submodule directory was "mostly deleted", only leaving two object files that 
> weren't ".gitignore"d.
> (But the error message was the same)
> 
> Wouldn't a message like "... submodule directory contains untracked files; 
> won't delete those..." be better?
> 
> Regards,
> Ulrich
> 
>