[wp-trac] [WordPress Trac] #51081: Fatal Error - Undefined get_page_templates() in Customizer

[WordPress Trac]

#51081: Fatal Error - Undefined get_page_templates() in Customizer
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 Reporter:  Howdy_McGee    |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  5.5.1
Component:  Customize      |     Version:  5.5
 Severity:  normal         |  Resolution:
 Keywords:  needs-testing  |     Focuses:  administration, template
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Comment (by dlh):

 @Howdy_McGee I'm sorry to hear that this change to the Customizer caused
 an issue on your site. It probably could have used a stronger callout in a
 5.5 dev note, and it's on me for not having thought of it.

 Still, I'm inclined to agree with Sergey that it's not going to be
 feasible to try to load the same admin context in the Customizer that
 `get_post_states()` ran in previously. Adding the `function_exists()`
 check might be the best way to go. A `@since` note in the filter docs
 might also be appropriate, as suggested.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51081#comment:3>
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