lock_ref_for_update(): avoid a symref resolution

diff --git a/refs/files-backend.c b/refs/files-backend.c
index 6f8fecd024d177afe2427d58fae603c52a4ee156..769e5c410043afd2f0d4304fbef3850662437ed0 100644 (file)
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3479,7 +3479,7 @@ static int lock_ref_for_update(struct ref_update *update,
                         * the transaction, so we have to read it here
                         * to record and possibly check old_sha1:
                         */
-                       if (read_ref_full(update->refname, 0,
+                       if (read_ref_full(referent.buf, 0,
                                          lock->old_oid.hash, NULL)) {
                                if (update->flags & REF_HAVE_OLD) {
                                        strbuf_addf(err, "cannot lock ref '%s': "