[wp-trac] [WordPress Trac] #60928: Interactivity API: Fatal error with empty image

[WordPress Trac]

#60928: Interactivity API: Fatal error with empty image
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 Reporter:  donohoe            |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  6.5.3
Component:  Editor             |     Version:  6.5
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
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Comment (by grantmkin):

 @rasshivkina Thanks for following up with details, and I'm glad you found
 a fix for your issue!

 I'm not sure what filter you were using on the image block. If it was
 `render_block_core/image`, and the callback was returning `null` for block
 content, I think it's expected that could cause issues.

 The `$block_content` value returned by the filter is expected to be a
 string (see the filter documentation here:
 https://developer.wordpress.org/reference/hooks/render_block_this-name/)

 From the error shared in the ticket description, the type hinting added to
 the static closure within
 `wp_interactivity_process_directives_of_interactive_blocks` seems to be
 what's triggering the error, and this code is new since WP 6.5. But since
 the `render_block_{$this->name}` filter is expected to return a string, I
 don't think there's anything to fix within the WordPress code. Block
 render output is generally always expected to be a string.

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Ticket URL: <https://core.trac.wordpress.org/ticket/60928#comment:10>
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