Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
 refs/files-backend.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/refs/files-backend.c b/refs/files-backend.c
index 001b8ef..2f8eb54 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3514,20 +3514,21 @@ static int check_old_oid(struct ref_update *update, 
struct object_id *oid,
  * - If it is an update of head_ref, add a corresponding REF_LOG_ONLY
  *   update of HEAD.
  */
-static int lock_ref_for_update(struct ref_update *update,
+static int lock_ref_for_update(struct files_ref_store *refs,
+                              struct ref_update *update,
                               struct ref_transaction *transaction,
                               const char *head_ref,
                               struct string_list *affected_refnames,
                               struct strbuf *err)
 {
-       struct files_ref_store *refs =
-               get_files_ref_store(NULL, "lock_ref_for_update");
        struct strbuf referent = STRBUF_INIT;
        int mustexist = (update->flags & REF_HAVE_OLD) &&
                !is_null_sha1(update->old_sha1);
        int ret;
        struct ref_lock *lock;
 
+       assert_main_repository(&refs->base, "lock_ref_for_update");
+
        if ((update->flags & REF_HAVE_NEW) && is_null_sha1(update->new_sha1))
                update->flags |= REF_DELETING;
 
@@ -3730,8 +3731,8 @@ static int files_transaction_commit(struct ref_store 
*ref_store,
        for (i = 0; i < transaction->nr; i++) {
                struct ref_update *update = transaction->updates[i];
 
-               ret = lock_ref_for_update(update, transaction, head_ref,
-                                         &affected_refnames, err);
+               ret = lock_ref_for_update(refs, update, transaction,
+                                         head_ref, &affected_refnames, err);
                if (ret)
                        goto cleanup;
        }
-- 
2.9.3

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