[PATCH V2] update: warn if cwd was deleted

[Pierre-Yves David]

On 09/02/2016 10:43 PM, Stanislau Hlebik wrote:
> # HG changeset patch
> # User Stanislau Hlebik <stash at fb.com>
> # Date 1472848944 25200
> #      Fri Sep 02 13:42:24 2016 -0700
> # Node ID 374caff3f6ba064070d01329eec1bd33a6a45370
> # Parent  318e2b600b80e4ed3c6f37df46ec7544f60d4c0b
> update: warn if cwd was deleted
>
> During update directories are deleted as soon as they have no entries.
> But if current working directory is deleted then it cause problems
> in complex commands like 'hg split'. This commit adds a warning
> that will help users figure the problem faster.

There is a precedence about this scenarion in 'rebase'. Did anyone 
checked it out. We should probably ensure we have a unify approach here.

-- 
Pierre-Yves David