If the user has asked that a new value be set for a reference, we use
check_refname_format() to verify that the reference name satisfies all
of the rules. But in other cases, at least check that refname_is_safe().

Signed-off-by: Michael Haggerty <[email protected]>
---
 refs.c                  | 5 +++--
 t/t1400-update-ref.sh   | 2 +-
 t/t1430-bad-ref-name.sh | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/refs.c b/refs.c
index 7c4eeb1..842c5c7 100644
--- a/refs.c
+++ b/refs.c
@@ -805,8 +805,9 @@ int ref_transaction_update(struct ref_transaction 
*transaction,
 {
        assert(err);
 
-       if (new_sha1 && !is_null_sha1(new_sha1) &&
-           check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
+       if ((new_sha1 && !is_null_sha1(new_sha1)) ?
+           check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
+           !refname_is_safe(refname)) {
                strbuf_addf(err, "refusing to update ref with bad name '%s'",
                            refname);
                return -1;
diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
index 40b0cce..08bd8fd 100755
--- a/t/t1400-update-ref.sh
+++ b/t/t1400-update-ref.sh
@@ -23,7 +23,7 @@ test_expect_success setup '
 m=refs/heads/master
 n_dir=refs/heads/gu
 n=$n_dir/fixes
-outside=foo
+outside=refs/foo
 
 test_expect_success \
        "create $m" \
diff --git a/t/t1430-bad-ref-name.sh b/t/t1430-bad-ref-name.sh
index 25ddab4..8937e25 100755
--- a/t/t1430-bad-ref-name.sh
+++ b/t/t1430-bad-ref-name.sh
@@ -285,7 +285,7 @@ test_expect_success 'update-ref -d cannot delete non-ref in 
.git dir' '
        echo precious >expect &&
        test_must_fail git update-ref -d my-private-file >output 2>error &&
        test_must_be_empty output &&
-       test_i18ngrep -e "cannot lock .*: unable to resolve reference" error &&
+       test_i18ngrep -e "refusing to update ref with bad name" error &&
        test_cmp expect .git/my-private-file
 '
 
-- 
2.8.1

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