[wp-trac] [WordPress Trac] #59018: Blocks in child themes with folder names starting with the same as the parent cannot load assets in WP6.3

[WordPress Trac]

#59018: Blocks in child themes with folder names starting with the same as the
parent cannot load assets in WP6.3
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 Reporter:  lgladdy       |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  6.3
 Severity:  major         |   Keywords:
  Focuses:                |
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 A bug has been introduced in WordPress 6.3 for blocks contained inside a
 child theme, where their path begins with the parent themes path.

 For example, if my theme is called `twentytwentythreechild` as is a child
 theme of `twentytwentythree` the code in blocks.php's
 register_block_script_handle and register_block_style_handle to handle
 child themes assets path will incorrectly change the script to:

 `/wp-content/themes/twentytwentythree/child/blocks/all-fields-block-json
 /all-fields-block-in-theme.js`

 instead of:

 `/wp-content/themes/twentytwentythreechild/blocks/all-fields-block-json
 /all-fields-block-in-theme.js`

 The specific code causing this is the switch on `$is_parent_theme_block`,
 commented as `// Get the script path deterministically based on whether or
 not it was registered in a parent or child theme.`

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Ticket URL: <https://core.trac.wordpress.org/ticket/59018>
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