test_must_fail git log -S
'
+test_expect_success 'diff --cached on unborn branch' '
+ echo ref: refs/heads/unborn >.git/HEAD &&
+ git diff --cached >result &&
+ test_cmp "$TEST_DIRECTORY/t4013/diff.diff_--cached" result
+'
+
+test_expect_success 'diff --cached -- file on unborn branch' '
+ git diff --cached -- file0 >result &&
+ test_cmp "$TEST_DIRECTORY/t4013/diff.diff_--cached_--_file0" result
+'
+
test_done