Re: [PATCH v2 1/1] config: report a bug if git_dir exists without commondir

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
> 
> This did happen at some stage, and was fixed relatively quickly. Make
> sure that we detect very quickly, too, should that happen again.
> 
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  config.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/config.c b/config.c
> index 4051e38823..db6b0167c6 100644
> --- a/config.c
> +++ b/config.c
> @@ -1676,6 +1676,8 @@ static int do_git_config_sequence(const struct config_options *opts,
>  
>  	if (opts->commondir)
>  		repo_config = mkpathdup("%s/config", opts->commondir);
> +	else if (opts->git_dir)
> +		BUG("git_dir without commondir");