[PATCH shelve-ext] shelve: make unshelve not crash when there are missing files (issue4176)

[Sean Farley]

Kostia Balytskyi <ikostia at fb.com> writes:

> # HG changeset patch
> # User Kostia Balytskyi <ikostia at fb.com>
> # Date 1484848120 28800
> #      Thu Jan 19 09:48:40 2017 -0800
> # Node ID 2a1e998e369d2c5dc828ba805beceb15459746cd
> # Parent  9f264adbe75bfae8551dc0e6e0fce8d43fc7b43a
> shelve: make unshelve not crash when there are missing files (issue4176)
>
> This patch makes it possible to unshelve while having missing files
> in your repo as long as shelved changes don't touch those missing files.
> It also makes error message better otherwise.

This patch seems good to me from an initial reading and probably belongs
on stable.