[wp-trac] [WordPress Trac] #64434: Theme_JSON_Resolver throws fatals in some scenarios

[WordPress Trac]

#64434: Theme_JSON_Resolver throws fatals in some scenarios
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 Reporter:  oandregal     |      Owner:  oandregal
     Type:  defect (bug)  |     Status:  assigned
 Priority:  normal        |  Milestone:  7.0
Component:  Editor        |    Version:  trunk
 Severity:  normal        |   Keywords:  has-patch
  Focuses:                |
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 ## Description

 In certain scenarios, when the Theme_JSON_Resolver gets a post to prepare
 the user styles, it's null.

 For example, in [this line https://github.com/WordPress/wordpress-
 develop/blob/44f1517e8f6dd72710a143420c3a0c2bae1a3766/src/wp-includes
 /class-wp-theme-json-resolver.php#L535], get_post function returns null
 after the wp_insert_post function is called. Although the post is saved,
 it's assumed that it can be immediately accessed, which is not always
 true.

 ## How to reproduce

 Unfortunately, there's no steps to reproduce it consistently. We've just
 seen reports by hosts that this happens occassionally in certain
 transition states for the site (creation, migration, etc.).

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Ticket URL: <https://core.trac.wordpress.org/ticket/64434>
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