Re: [PATCH] git stash: Avoid data loss when saving a stash

[Junio C Hamano <gitster@pobox.com>]

Petr Baudis <pasky@ucw.cz> writes:

> diff --git a/git-stash.sh b/git-stash.sh
> index 1e541a2..3cb9b05 100755
> --- a/git-stash.sh
> +++ b/git-stash.sh
> @@ -258,6 +262,12 @@ save_stash () {
>  		say "$(gettext "No local changes to save")"
>  		exit 0
>  	fi
> +	if test -z "$untracked$force" -a -n "$(git ls-files --killed | head -n 1)"; then
> +		say "$(gettext "The following untracked files would NOT be saved but need to be removed by stash save:")"

I think "ls-files --killed" was not adjusted for the new world order
when submodules were introduced.  With this change, you see t7402
break, even though "git status" would say

# Changes not staged for commit:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working
#   directory)
#
#       modified:   file
#       modified:   submodule (new commits)

The path "submodule" in HEAD and the index is already submodule, so
"stash save" that reverts to the original state will _not_ have to
kill it, but the new check triggers it.

Exactly the same breakage this patch introduces triggers in t7610,
too.

I think another patch to teach "ls-files --killed" what to do with
submodules is needed as a preliminary step before this patch.