Not possible to register style for media and text block

[swissspidy]

Describe the bug
As soon as you register a style for the media and text block, the editor crashes when you attempt to change the block's style.

Here's the code I used:

registerBlockStyle( 'core/media-text', {
	name: 'test',
	label: 'Test',
} );

To Reproduce
Steps to reproduce the behavior:

1. Register block style
2. Add new media & text block
3. Either click on styles panel in the block settings sidebar, or the style selector in the toolbar.
4. See error ("The editor has encountered an unexpected error…")

This is the error I'm getting:

TypeError: Cannot read property 'innerBlocks' of null
    at t.value (https://test.local/content/plugins/gutenberg/build/editor/index.js?ver=1541526670:50:141355)
    at jc (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:134:123)
    at gc (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:127:223)
    at vb (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:126:230)
    at ub (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:126:65)
    at wg (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:137:182)
    at Ze (https://test.local/content/plugins/gutenberg/vendor/react-dom.min.82e21c65.js:41:24)

Expected behavior

I should be able to change the block style.

Screenshots

Desktop

Chrome 70 on macOS

Additional context

Gutenberg 4.2 on WordPress 4.9.8

[jorgefilipecosta]

Thank you for reporting this issue @swissspidy.

I'm able to reproduce this problem. In my tests, it happens in every block with innerBlocks.

registerBlockStyle( 'core/columns', {
	name: 'test',
	label: 'Test',
} );

Registering a style for the columns block also crashes the editor.

[youknowriad]

Yes, let's close as a duplicate of #9897