Drew Crawford <d...@drewcrawfordapps.com> writes:

> I noticed today that if you leave off the branch name from git subtree like 
> so:
> $ git subtree add --prefix somewhere -m "adding CDH as subtree" path/to/repo
> warning: read-tree: emptying the index with no arguments is deprecated; use 
> --empty
> fatal: just how do you expect me to merge 0 trees?
> The error message is not particularly helpful (and seems to actually be in 
> read-subtree?)  The solution in my case was to add the branch name on the end 
> of the command.
> Ideally it would be better to emit an error-message from a script higher up 
> the calling chain that would be more descriptive about the problem (such as 
> suggesting no branch is specified).--

Good idea.  I'll code it up.

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