[wp-trac] [WordPress Trac] #59772: 6.3 block themes require index.php if current theme is not block based

[WordPress Trac]

#59772: 6.3 block themes require index.php if current theme is not block based
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 Reporter:  dgaidula      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Themes        |    Version:  6.3.2
 Severity:  major         |   Keywords:
  Focuses:                |
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 If the currently activated theme is not block based, WP 6.3 will report
 all block based themes as broken until adding an empty index.php at root
 of theme. This appears to be related to the new '$this->is_block_theme()'
 check introduced into class-wp-theme.php with 6.3+. I rolled back to WP
 6.2.3 and non-block based and block-based themes can co-exist without the
 warning. The error message thrown is non-obvious what to fix since the
 perfectly functioning block-based themes 2023 1.2 include suddenly break
 with message about missing files that aren't missing.

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Ticket URL: <https://core.trac.wordpress.org/ticket/59772>
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