Merge branch 'mh/update-ref-batch-create-fix' into maint

* mh/update-ref-batch-create-fix:
  update-ref: fail create operation over stdin if ref already exists

1 files changed, 11 insertions, 0 deletions

diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
index 6ffd82fe32..e130c528fe 100755
--- a/t/t1400-update-ref.sh
+++ b/t/t1400-update-ref.sh
@@ -820,7 +820,18 @@ test_expect_success 'stdin -z update ref fails with bad old value' '
 	test_must_fail git rev-parse --verify -q $c
 '
 
+test_expect_success 'stdin -z create ref fails when ref exists' '
+	git update-ref $c $m &&
+	git rev-parse "$c" >expect &&
+	printf $F "create $c" "$m~1" >stdin &&
+	test_must_fail git update-ref -z --stdin <stdin 2>err &&
+	grep "fatal: Cannot lock the ref '"'"'$c'"'"'" err &&
+	git rev-parse "$c" >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'stdin -z create ref fails with bad new value' '
+	git update-ref -d "$c" &&
 	printf $F "create $c" "does-not-exist" >stdin &&
 	test_must_fail git update-ref -z --stdin <stdin 2>err &&
 	grep "fatal: invalid new value for ref $c: does-not-exist" err &&