[wp-trac] [WordPress Trac] #40521: Using a custom query var on a static front page results in wrong $post

[WordPress Trac]

#40521: Using a custom query var on a static front page results in wrong $post
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 Reporter:  mechter                    |       Owner:  (none)
     Type:  defect (bug)               |      Status:  new
 Priority:  normal                     |   Milestone:  Future Release
Component:  Query                      |     Version:  4.7.4
 Severity:  normal                     |  Resolution:
 Keywords:  needs-patch has-test-info  |     Focuses:
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Changes (by SirLouen):

 * keywords:   => needs-patch has-test-info
 * component:  Posts, Post Types => Query
 * milestone:  Awaiting Review => Future Release


Comment:

 == Reproduction Report
 === Description
 ✅ This report validates that the issue can be reproduced.

 === Environment
 - WordPress: 6.9-alpha-60093-src
 - PHP: 8.2.29
 - Server: nginx/1.29.1
 - Database: mysqli (Server: 8.4.6 / Client: mysqlnd 8.2.29)
 - Browser: Chrome 139.0.0.0
 - OS: Windows 10/11
 - Theme: Twenty Twenty-Five 1.3
 - MU Plugins: None activated
 - Plugins:
   * BBB Testing Dolly
   * Test Reports 1.2.0

 === Instructions
 1. The ones provided by OP.

 === Actual Results
 1. ✅ Error condition occurs (reproduced).

 === Additional Notes
 - There is something weird around this line
 https://github.com/wordpress/wordpress-
 develop/blob/9ca38ce47b7a8a9c9e916e6aff39ec772ccbba55/src/wp-includes
 /class-wp-query.php#L1057
 That `array_diff` is not correctly formulated, as the result unexpectedly
 is this `buggy` query var. I'm assuming that the idea is, that if any of
 those query vars existed, not to show the front page, but the
 corresponding search page. A patch is needed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40521#comment:4>
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