[wp-trac] [WordPress Trac] #31484: Widgets in Customizer during theme preview fail to preview widgets with prior sidebars_widgets theme mod and fail to apply upon activation

[WordPress Trac]

#31484: Widgets in Customizer during theme preview fail to preview widgets with
prior sidebars_widgets theme mod and fail to apply upon activation
--------------------------+-------------------------
 Reporter:  westonruter   |       Owner:  ocean90
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  4.1.2
Component:  Customize     |     Version:  4.1
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  javascript
--------------------------+-------------------------
Changes (by westonruter):

 * keywords:  needs-patch => has-patch
 * owner:   => ocean90
 * status:  new => assigned


Comment:

 In [attachment:31484.diff]:

  * Unset `wp_get_sidebars_widgets()`' non-admin cache var
 `$_wp_sidebars_widgets` in Customize theme preview so that we can
 override.
  * Add `WP_Customize_Setting::$dirty` so that settings can be initially-
 dirty when the Customizer loads, and use on the
 `old_sidebars_widgets_data` setting.
  * Mark all `sidebars_widgets` settings as initially-dirty during theme
 switch.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31484#comment:5>
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