array_merge() error in theme.inc

Before we continue, can you please try reproduce the problem in 4.7 dev?

Casting the result to array() is not a proper solution as an illegal value of theme_settings (ie not an array) has been erroneously saved.

To confirm that suspicion, can you please post the results of the following query:

SELECT * FROM variables WHERE name = 'theme_settings';

And the partial result of the query:

SELECT data FROM cache WHERE cid = 'variables';

The interesting part of the second query would look like:

s:14:"theme_settings";a:17:{s:11:"toggle_logo";i:1;s:11:"toggle_name";i:1;s:13:"toggle_slogan";i:0;
s:14:"toggle_mission";i:1;s:24:"toggle_node_user_picture";i:0;s:27:"toggle_comment_user_picture";i:0;
s:13:"toggle_search";i:1;s:14:"toggle_favicon";i:1;s:21:"toggle_node_info_page";i:1;s:22:"toggle_node_info_story";i:1;
s:12:"default_logo";i:1;s:9:"logo_path";s:0:"";s:11:"logo_upload";N;s:15:"default_favicon";i:1;s:12:"favicon_path";s:0:"";
s:14:"favicon_upload";N;s:10:"form_token";s:32:"7e3cc7677f4823d91a7e032ad1130d66";}

Thanks in advance.

Closing, no feedback.