[wp-trac] [WordPress Trac] #43502: `WP_REST_Posts_Controller::prepare_item_for_response()` doesn't reset postdata after calling setup_postdata()

[WordPress Trac]

#43502: `WP_REST_Posts_Controller::prepare_item_for_response()` doesn't reset
postdata after calling setup_postdata()
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 Reporter:  gerbenvandijk                        |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Future
                                                 |  Release
Component:  REST API                             |     Version:  4.9.4
 Severity:  normal                               |  Resolution:
 Keywords:  good-first-bug has-patch has-unit-   |     Focuses:  rest-api
  tests                                          |
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Comment (by liaison):

 I've refreshed the patch and opened PR #11455.

 Tests conducted:
 * Verified all 238 CI checks passed (PHP 7.2 - 8.4).
 * Included 2 new unit tests specifically for global $post restoration (one
 for existing post, one for null).
 * Confirmed fix for 'pollution' during internal REST API calls.

 [[Image(ticket-43502.png, 600px)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/43502#comment:28>
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