gutenberg 9.2.1 Uncaught ArgumentCountError: Too few arguments to function {closure}(),

[franmastromarino]

Hello guys

I start receiving this error in the logs after latest update

Describe the bug
[23-Oct-2020 13:24:09 UTC] PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed in C:\wamp64\www\test\wp-includes\class-wp-block-type.php on line 186 and exactly 3 expected in C:\wamp64\www\test\wp-content\plugins\gutenberg\lib\compat.php:536
Stack trace:
#0 C:\wamp64\www\test\wp-includes\class-wp-block-type.php(186): {closure}(Array, '')
#1 C:\wamp64\www\test\wp-content\plugins\gutenberg\lib\widget-preview-template.php(37): WP_Block_Type->render(Array)
#2 C:\wamp64\www\test\wp-content\plugins\gutenberg\lib\widgets.php(281): require_once('C:\wamp64\www\w...')
#3 C:\wamp64\www\test\wp-includes\class-wp-hook.php(287): gutenberg_load_widget_preview_if_requested('')
#4 C:\wamp64\www\test\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters('', Array)
#5 C:\wamp64\www\test\wp-includes\plugin.php(478): WP_Hook->do_action(Array)
#6 C:\wamp64\www\test\wp-admin\admin.php(237): do_action('load-appearance...')
#7 C:\wamp64\www\test\wp-admin\themes.php(10): require_once('C:\wamp64 in C:\wamp64\www\test\wp-content\plugins\gutenberg\lib\compat.php on line 536

To reproduce
Steps to reproduce the behavior:

1. Go to http://localhost/test/wp-admin/themes.php?page=gutenberg-widgets
2. Click on Widget Preview

Screenshotshttps://snipboard.io/4FnKtx.jpg

[mkaz]

Likewise, I received a WordPress health check Your Site is Experiencing a Technical Issue notice, running Gutenberg plugin 9.2.1 on WP 5.5.1 with Twenty Twenty-One theme

Error Details
=============
An error of type E_ERROR was caused in line 536 of the file /srv/htdocs/wp-content/plugins/gutenberg/lib/compat.php. Error message: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed in /wordpress/core/5.5.1/wp-includes/class-wp-block-type.php on line 186 and exactly 3 expected in /srv/htdocs/wp-content/plugins/gutenberg/lib/compat.php:536
Stack trace:
#0 /wordpress/core/5.5.1/wp-includes/class-wp-block-type.php(186): {closure}(Array, '')
#1 /srv/htdocs/wp-content/plugins/gutenberg/lib/widget-preview-template.php(37): WP_Block_Type->render(Array)
#2 /srv/htdocs/wp-content/plugins/gutenberg/lib/widgets.php(281): require_once('/srv/htdocs/wp-...')
#3 /wordpress/core/5.5.1/wp-includes/class-wp-hook.php(287): gutenberg_load_widget_preview_if_requested('')
#4 /wordpress/core/5.5.1/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array)
#5 /wordpress/core/5.5.1/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#6 /wordpress/core/5.5.1/wp-admin/admin.php(237): do_action('load-appearance...')
#7 /wordpress/core/5.5.1/wp-admin/themes.php(10): require_once('/wordpress/core...')
#8 {main}

[mkaz]

@nosolosw I think this might be related to #26356

It is not caused by that PR, since this bug is in the version prior to your change, but it involves much of the same files and functions.

[mkaz]

Thanks @sirreal for the pointer, it looks like this will be closed in #26417 and the matching core patch at WordPress/wordpress-develop#640

[cabrerahector]

Hey guys, not sure if this helps but I got this exact same error after adding a non-core widget (WordPress Popular Posts) to a sidebar in the new Widgets screen following the testing flow mentioned here: Call for Testing the Widgets Screen in Gutenberg 9.1.

[youknowriad]

I think this is now fixed in this ticket. https://core.trac.wordpress.org/ticket/51606

[oandregal]

I could repro this with 5.5.1 and Gutenberg 9.2.1. It's different from the issue we saw with beta 1 and it's fixed by #26417 I think we need a patch release to fix this one.

[oandregal]

This is fixed in 9.2.2. Thanks for reporting!

[franmastromarino]

thank you guys!