Teach revision walking machinery to walk multiple times sequencially

diff --git a/t/t2018-checkout-branch.sh b/t/t2018-checkout-branch.sh
index 75874e85dfbcae8ea9634693a93524841b741559..2741262369e40a05cdc6732e4c9e6f04acb63bba 100755 (executable)
--- a/t/t2018-checkout-branch.sh
+++ b/t/t2018-checkout-branch.sh
@@ -189,12 +189,13 @@ test_expect_success 'checkout -b <describe>' '
        test_cmp expect actual
 '
 
-test_expect_success 'checkout -B to the current branch fails before merging' '
+test_expect_success 'checkout -B to the current branch works' '
        git checkout branch1 &&
+       git checkout -B branch1-scratch &&
+
        setup_dirty_mergeable &&
-       git commit -mfooble &&
-       test_must_fail git checkout -B branch1 initial &&
-       test_must_fail test_dirty_mergeable
+       git checkout -B branch1-scratch initial &&
+       test_dirty_mergeable
 '
 
 test_done