White screen of death in theme editor when blank theme is activated.

[lamarajan]

I am trying to develop a theme for wordpress 6.1.1. When I create a blank theme and included a required file to develop a theme.
​https://prnt.sc/hOqIGShQnO1p
But when activated a theme, and click on editor, there is white screen of death. But same theme is working for WordPress 6.1.
Here is style.css settings

​https://prnt.sc/ltK7EzjerQNR

Is this a bug or I missed something.

[poena]

Hi!
Are you able to share a complete copy of the theme for testing?

[lamarajan]

Hello @poena,

I couldn't find button to upload the theme. So I have provide you repo link.
​https://github.com/rajanlama786/test-theme-fse

And I am getting this is error in the console.

​https://prnt.sc/xbNl5bvaCi3Z

[lamarajan]

here is the test theme.

[lamarajan]

Hello,

This is the same theme I have tested in 6.1. And here is the screen shot.

​https://prnt.sc/3txllXfJjT83

[costdev]

Issue reproduced with the theme provided above, as well as a simple style.css + templates/index.html theme.

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• Introduced in [54799]. (6.1.1)
• Milestoning for 6.1.2.
• Increasing Priority to high.
• Pinging folks who worked on this to help the ticket move forward: @flixos90, @manuilov, @oandregal, @peterwilsoncc, @spacedmonkey

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TL;DR - When a block theme does not have a theme.json file, the editor screen is blank.

Looks like it might be an issue with ​this condition (removing this early return allows the theme to load), or maybe the changes to ::theme_has_support().

[lamarajan]

Hello @costdev,

Thank you for response.
OK, and If theme.json is mandatory, I think theme need to be displayed as broken theme with message. Please Add theme.json.

Regards,
rajan

[costdev]

Hi @lamarajan, theme.json is not mandatory for block themes.

Per ​WP_Theme::is_block_theme(), the only requirements for a block theme are the existence of a templates/index.html, or for backward compatibility, block-templates/index.html. To clarify, templates/index.html is the recommended one.

This is a regression introduced in 6.1.1.

---

See ​GB 46073, which has a patch.

As this has been reported and will be patched upstream in the Gutenberg repository, I'll close this ticket as reported-upstream.

@mamaduka I can't see a milestone in the Gutenberg repo for 6.1.2. Would it be possible to ensure that ​GB 46073 gets assigned there when the milestone is available?

[lamarajan]

Hello @costdev,
Ok thank you.

I hope I have contributed in WordPress Core As well by creating this ticket. I will keep contributing :)

Regards
lamarajan

[Mamaduka]

Thanks for the ping, @costdev.

I added the backport label since we don't have a WP 6.1.2 project board yet.

[costdev]

@lamarajan Thank you for reporting this issue and please do continue contributing! 🙂

@mamaduka Thanks!