Error message

• Warning: igbinary_unserialize_zval: unknown type '36', position 1048082 in _dmemcache_get_pieces() (line 366 of sites/all/modules/memcache/dmemcache.inc).
• Warning: igbinary_unserialize_zval: unknown type '36', position 1048082 in _dmemcache_get_pieces() (line 366 of sites/all/modules/memcache/dmemcache.inc).