reflog-walk: don't segfault on non-commit sha1's in the reflog

diff --git a/t/t1410-reflog.sh b/t/t1410-reflog.sh
index b79049f6f606f106e40dfdc241d7a168b10b88cb..17a194bfa6e80871f6cb002e1ee3bcd0c832be84 100755 (executable)
--- a/t/t1410-reflog.sh
+++ b/t/t1410-reflog.sh
@@ -325,4 +325,17 @@ test_expect_success 'parsing reverse reflogs at BUFSIZ boundaries' '
        test_cmp expect actual
 '
 
+test_expect_success 'no segfaults for reflog containing non-commit sha1s' '
+       git update-ref --create-reflog -m "Creating ref" \
+               refs/tests/tree-in-reflog HEAD &&
+       git update-ref -m "Forcing tree" refs/tests/tree-in-reflog HEAD^{tree} &&
+       git update-ref -m "Restoring to commit" refs/tests/tree-in-reflog HEAD &&
+       git reflog refs/tests/tree-in-reflog
+'
+
+test_expect_failure 'reflog with non-commit entries displays all entries' '
+       git reflog refs/tests/tree-in-reflog >actual &&
+       test_line_count = 3 actual
+'
+
 test_done