wp_title error notice on custom post type archive title with filter

[thomask]

I have custom post type (​http://money.mediacentrum.cz/reference/)and i got there filter by custom taxonomies e.g. ​http://money.mediacentrum.cz/reference/?kraj=&produkt=money-s3&branze=

in the TITLE i got standard <?php wp_title(); ?>, which works normaly on custom post type archive, but throws error notice on the page filtered by taxonomies:
Notice</b>: Undefined property: stdClass::$labels in <b>/var/www/vhosts/money.cz/httpdocs/wp-includes/general-template.php</b> on line <b>665</b>

problem is with get_queried_object() function, which do not populate the labels field, but just from that filter, e.g. in this case

stdClass::__set_state(array(
   'term_id' => '7',
   'name' => 'Money S3',
   'slug' => 'money-s3',
   'term_group' => '0',
   'term_taxonomy_id' => '227',
   'taxonomy' => 'produkt',
   'description' => '',
   'parent' => '0',
   'count' => '118',
))

I'm quite sure, i am doing it right, but even if not, the function should not throw an error notice.
I'm going to solve it with something like

 (isset (get_queried_object()->labels))? get_queried_object()->labels->name : get_queried_object()->name

but imo even labels should be populated

[SergeyBiryukov]

#18614, #19035