Attempt to assign property "content" on null in compat/wordpress-6.6/resolve-patterns.php

[jeremyfelt]

Description

In Gutenberg 18.1.0, get_block_template is filtered with gutenberg_replace_pattern_blocks_get_block_template(), which is looking for a full WP_Block_Template object.

It is possible for null to be passed to the get_block_template filter instead. When this happens, a fatal error occurs because Gutenberg attempts to read/assign the content property.

Step-by-step reproduction instructions

Sorry, I'm mid-launch on something, so I can't spend much time on this part. But I'll loop back soon.

But, in a situation where get_block_file_template() returns null for a template during get_block_template(), that null will be passed to get_block_template.

Screenshots, screen recording, code snippet

No response

Environment info

WordPress 6.5, Gutenberg 18.1.0

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

No

[jeremyfelt]

Ugh, I just realized a fix for this is already in trunk. Sorry for the noise, but hoping that's a quick .1 release.