read-tree A B C: do not create a bogus index and do not segfault

diff --git a/t/t7300-clean.sh b/t/t7300-clean.sh
index bd7723970869aa0ce8f48b83fdc568821fdf737c..2b51c0d7d8ab727a5fb0be8338938f1d3b2eb6a3 100755 (executable)
--- a/t/t7300-clean.sh
+++ b/t/t7300-clean.sh
@@ -316,14 +316,14 @@ test_expect_success 'git-clean -d -X' '
 test_expect_success 'clean.requireForce defaults to true' '
 
        git config --unset clean.requireForce &&
-       ! git-clean
+       test_must_fail git clean
 
 '
 
 test_expect_success 'clean.requireForce' '
 
        git config clean.requireForce true &&
-       ! git-clean
+       test_must_fail git clean
 
 '