dir = &entry->u.subdir;
        if (entry->flag & REF_INCOMPLETE) {
                if (!dir->cache->fill_ref_dir)
-                       die("BUG: incomplete ref_store without fill_ref_dir function");
+                       BUG("incomplete ref_store without fill_ref_dir function");
 
                dir->cache->fill_ref_dir(dir->cache->ref_store, dir, entry->name);
                entry->flag &= ~REF_INCOMPLETE;
                return -1;
        entry = dir->entries[entry_index];
 
-       memmove(&dir->entries[entry_index],
-               &dir->entries[entry_index + 1],
-               (dir->nr - entry_index - 1) * sizeof(*dir->entries)
-               );
+       MOVE_ARRAY(&dir->entries[entry_index],
+                  &dir->entries[entry_index + 1], dir->nr - entry_index - 1);
        dir->nr--;
        if (dir->sorted > entry_index)
                dir->sorted--;
                /* This is impossible by construction */
                die("Reference directory conflict: %s", ref1->name);
 
-       if (oidcmp(&ref1->u.value.oid, &ref2->u.value.oid))
+       if (!oideq(&ref1->u.value.oid, &ref2->u.value.oid))
                die("Duplicated ref, and SHA1s don't match: %s", ref1->name);
 
        warning("Duplicated ref: %s", ref1->name);