test_cmp important c0.c
'
+test_expect_success 'set up unborn branch and content' '
+ git symbolic-ref HEAD refs/heads/unborn &&
+ rm -f .git/index &&
+ echo foo > tracked-file &&
+ git add tracked-file &&
+ echo bar > untracked-file
+'
+
+test_expect_failure 'will not clobber WT/index when merging into unborn' '
+ git merge master &&
+ grep foo tracked-file &&
+ git show :tracked-file >expect &&
+ grep foo expect &&
+ grep bar untracked-file
+'
+
test_done