Gutenberg crash if custom post type has template lock

[Tropicalista]

Description

I create a custom post type with template lock. All works great, but if I select patterns on block inserter Gutenberg crashes.

I think the problem is template lock, because disabling it, all works great.

Step-by-step reproduction instructions

1. Create a simple custom post type and set a template lock:

'template' => array(
    array( 'core/paragraph' ),
),
'template_lock' => 'insert',

2. Go to your cpt and select block patterns
3. Gutenberg crash
4. If you are lazy, simply download my Popper plugin, try to disable the template lock and all works as expected.

Screenshots, screen recording, code snippet

No response

Environment info

• WordPress 5.8.3
• TwentyTwentyTwo theme
• Clean install

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

Yes

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

Yes

[Mamaduka]

Hello, @Tropicalista

How are you inserting the pattern? The template_lock disables block inserter.

Am I missing any details?

Screenshot

[Tropicalista]

I have probably messed up something. I was testing the 5.9 release candidate.

Once the custom post type is created, the button is disabled. But if I try to insert a child block the pattern is enabled and should work. This was working great on 5.8.3.

You can test it using my plugin: https://wordpress.org/plugins/popper/

[t-hamano]

I have confirmed that this issue occurs not only with custom post types.

If template_lock is set to insert, the block should be locked and the inserter should be disabled.
But in the column block, it is unlocked and the editor crashes when the pattern is inserted.

I think blocks should not be able to be inserted at either level of hierarchy

Testing Instruction

• Insert a column block and one paragraph block on the post editor.
• Activate template_lock with the following code:

function custom_registered_post_type_post( $post_type, $post_type_object ) {
  $post_type_object->template = array(
    array( 'core/paragraph' )
  );
  $post_type_object->template_lock = 'insert';
}
add_action( 'registered_post_type_post', 'custom_registered_post_type_post', 10, 2 );

• Reload the post editor and confirm that the paragraph block is not locked.
• Press Enter to confirm that a new paragraph is created and the block inserter is activated.
• Selecting a pattern from the inserter will crash the editor.

95a52899d702f54688531442ccb9b5dc.mp4

Error Info

pattern-panel.js:68 Uncaught TypeError: Cannot read properties of undefined (reading 'name')
    at PatternInserterPanel (pattern-panel.js:68:31)
    at renderWithHooks (react-dom.js?ver=6.0.1:15015:20)
    at mountIndeterminateComponent (react-dom.js?ver=6.0.1:17841:15)
    at beginWork (react-dom.js?ver=6.0.1:19079:18)
    at HTMLUnknownElement.callCallback (react-dom.js?ver=6.0.1:3942:16)
    at Object.invokeGuardedCallbackDev (react-dom.js?ver=6.0.1:3991:18)
    at invokeGuardedCallback (react-dom.js?ver=6.0.1:4053:33)
    at beginWork$1 (react-dom.js?ver=6.0.1:23994:9)
    at performUnitOfWork (react-dom.js?ver=6.0.1:22806:14)
    at workLoopSync (react-dom.js?ver=6.0.1:22737:7)