[wp-trac] [WordPress Trac] #28183: Widget contents removed from widget areas upon upgrade to 3.9.1

[WordPress Trac]

#28183: Widget contents removed from widget areas upon upgrade to 3.9.1
--------------------------+------------------------------
 Reporter:  toggerybob    |       Owner:
     Type:  defect (bug)  |      Status:  reopened
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Widgets       |     Version:  3.9.1
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
--------------------------+------------------------------

Comment (by westonruter):

 Is it known whether or not the theme was also upgraded before the
 WordPress 3.9.1 upgrade was run? The `Theme_Upgrader::current_after()`
 method in `class-wp-upgrader.php` can actually call `switch_theme()`:

 {{{
 // Ensure stylesheet name hasn't changed after the upgrade:
 if ( $theme == get_stylesheet() && $theme !=
 $this->result['destination_name'] ) {
         wp_clean_themes_cache();
         $stylesheet = $this->result['destination_name'];
         switch_theme( $stylesheet );
 }
 }}}

 This in turn will cause `retrieve_widgets()` to run.

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Ticket URL: <https://core.trac.wordpress.org/ticket/28183#comment:8>
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