Passing array of styles causes PHP Warnings and Notices

[sanzeeb3]

Description

In the documentation: https://developer.wordpress.org/block-editor/reference-guides/block-api/block-metadata/#style

Note: An option to pass also an array of styles exists since WordPress 5.9.0.

passing an array of styles is possible since 5.9.0. However, I'm on WordPress 6.1 and there are some errors and notices:

[09-Aug-2022 11:04:58 UTC] PHP Notice: Array to string conversion in C:\laragon\www\dev\wp-includes\block-editor.php on line 340
[09-Aug-2022 11:04:58 UTC] PHP Warning: explode() expects parameter 2 to be string, array given in C:\laragon\www\dev\wp-includes\class.wp-dependencies.php on line 186
[09-Aug-2022 11:04:58 UTC] PHP Notice: Trying to access array offset on value of type null in C:\laragon\www\dev\wp-includes\class.wp-dependencies.php on line 187

Both the styles are enqueued, though.

Step-by-step reproduction instructions

1. Register a block with an array of styles. E.g.

register_block_type(
	'wpfda/block',
       [
                'style' => [ 'wpfda-style', 'wpfda-editor-style' ]
       ]

2. Go to new post page.
3. See the error.

Screenshots, screen recording, code snippet

No response

Environment info

Gutenberg is not installed.

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

[gziolo]

Passing an array of styles works when passed through block.json file. It doesn't work today when using the 2nd param from register_block_type. There is a proposal to address that: WordPress/wordpress-develop#2853. I hope to see it included in WordPress 6.1.

[gziolo]

I have an alternative proposal that should resolve the issue in WordPress core for all style and script types: WordPress/wordpress-develop#3108.

[t-hamano]

A similar problem was reported in #44687. And these issues have been fixed in Changeset 54670 and appear to be included in WordPress 6.1.

Therefore, this issue may be closed.