Fix unset array key warning in block-bindings.php

[benharri]

This has been throwing an error for several weeks on one of my sites

Simplest fix is to just bail early if it's unset

PHP Warning: Undefined array key "show_in_rest" in /var/www/wp-content/plugins/gutenberg/lib/compat/wordpress-6.7/block-bindings.php on line 70

What?

Fix undefined array key warning

Why?

My error logs have been filling up

How?

Bail early if it's unset.

Testing Instructions

I'm not 100% sure which custom post type this is throwing from, but I'm leaning towards buddypress.

Testing Instructions for Keyboard

No more warning thrown from block-bindings.php

Screenshots or screencast

n/a

[github-actions]

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Co-authored-by: benharri <benharri@git.wordpress.org>
Co-authored-by: SantosGuillamot <santosguillamot@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>

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[github-actions]

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[Mamaduka]

Thanks for contributing, @benharri!

I would recommend an early bailout like we did in #60862.

[SantosGuillamot]

I haven't been able to reproduce, even registering a meta field without show_in_rest, but I agree that an early bailout seems reasonable.

I guess that if we don't include an early bailout it could potentially fail in the next conditionals.

[benharri]

Here's a stack trace from my case. It does seem to be buddypresss.

From Query Monitor:

Undefined array key "show_in_rest"
    wp-content/plugins/gutenberg/lib/compat/wordpress-6.7/block-bindings.php:70
    gutenberg_update_meta_args_with_label()
    wp-includes/class-wp-hook.php:326
    apply_filters('register_meta_args')
    wp-includes/meta.php:1453
    register_meta()
    wp-includes/taxonomy.php:1534
    register_term_meta()
    wp-content/plugins/buddypress/bp-core/bp-core-functions.php:3552
    bp_register_type_meta()
    wp-content/plugins/buddypress/bp-members/bp-members-functions.php:2841
    bp_register_member_type_metadata()
    wp-includes/class-wp-hook.php:324
    do_action('bp_register_type_metadata')
    wp-content/plugins/buddypress/bp-core/bp-core-dependency.php:110
    bp_register_type_metadata()
    wp-includes/class-wp-hook.php:324
    do_action('bp_register_taxonomies')
    wp-content/plugins/buddypress/bp-core/bp-core-dependency.php:95
    bp_register_taxonomies()
    wp-includes/class-wp-hook.php:324
    do_action('bp_init')
    wp-content/plugins/buddypress/bp-core/bp-core-dependency.php:291
    bp_init()
    wp-includes/class-wp-hook.php:324
    do_action('init')
    wp-settings.php:700

Applying this fixes this warning