autoCRLF, git status, git-gui, what is the desired behavior?

I am trying autoCRLF in git compiled from next (75415c455dd307), find 
some behavior that is probably different than desired dealing with a 
file where the only changes are to line endings:

create a text file (foo) with \n endings, check it in.
$ u2d foo
$ git diff foo

diff --git a/foo b/foo

$ git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#
#       modified:   foo
#
$ git ci -m 'x' foo
# On branch master
nothing to commit (working directory clean)

So, git commit will not check in the file, but git status shows an 
unclean file and git diff shows no actual differences.

Also, git-gui shows the file as modified, but clicking on that file 
gives a warning box saying "No differences detected...", does a rescan, 
and then shows the file as modified again.

I'm not sure of the correct fix:
1) Place the file in a separate category, perhaps "broken line-endings", 
and indicate that git will not check this in?
2) Overwrite the file with a fresh checkout (erasing the crlf differences)?
3) ?

Mark Levedahl