[wp-trac] [WordPress Trac] #55195: Calling `::parent()` on a child theme object where parent theme is missing `index.php` returns false in WP5.9

[WordPress Trac]

#55195: Calling `::parent()` on a child theme object where parent theme is missing
`index.php` returns false in WP5.9
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 Reporter:  robdxw        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  5.9.2
Component:  Themes        |     Version:  5.9
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Changes (by azouamauriac):

 * keywords:   => needs-patch


Comment:

 Hello thanks for your report. I'm able to reproduce the bug, unfortunately
 I don't find the cause for the moment. but it seems like
 `$theme->parent()` returns an `objet` in 5.8 while it returns `false` in
 5.9...
 Also the github link you've provided, it seems like it's just for a
 fonction renamed.

 If you have more detail about the source of issue feel free to share it.
 thanks.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55195#comment:2>
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