Matthieu Moy [off-list ref] writes:
Everything is in the title. No time to bisect/fix this now, but:
$ git status
# On branch master
nothing to commit (working directory clean)
$ git stash -k
usage: git diff-index [-m] [--cached] [<common diff options>] <tree-ish> [<path>...]
Hmm, does not reproduce.
: alter victim-2.git/master; git status
# On branch master
nothing to commit (working directory clean)
: alter victim-2.git/master; git stash -k
No local changes to save
: alter victim-2.git/master; git version
git version 1.7.7