[Bug]: Unable to Use Subtitle doc block in MDX without a Story

[peschee]

Describe the bug

Since 8.1.0, the <Subtitle> doc block seems to be broken in MDX.

Before, the following used to work:

import { Meta, Subtitle } from '@storybook/blocks';

<Meta title="Some/Title" />

<Subtitle>Some subtitle</Subtitle>

now, the following error is shown:

No CSF file attached to this docs file, did you forget to use <Meta of={} />?

Removing the <Subtitle> doc block fixes things…

To Reproduce

https://stackblitz.com/edit/github-kqs5ug?file=src%2Fstories%2FConfigure.mdx

System

Storybook Environment Info:

  System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.18.0 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm <----- active
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @storybook/addon-essentials: ^8.1.0-beta.1 => 8.1.0 
    @storybook/addon-links: ^8.1.0-beta.1 => 8.1.0 
    @storybook/blocks: ^8.1.0-beta.1 => 8.1.0 
    @storybook/test: ^8.1.0-beta.1 => 8.1.0 
    @storybook/web-components: ^8.1.0-beta.1 => 8.1.0 
    @storybook/web-components-vite: ^8.1.0-beta.1 => 8.1.0 
    storybook: ^8.1.0-beta.1 => 8.1.0

Additional context

Also happens with 8.1.0. The minimal repro was created from storybook.new, which still seems to use the beta.

[peschee]

I just noticed that after downgrading our SB instance back to 8.0.10 (after regenerating the lock file), it does not work any more even there. So it might be an issue with a transitive dependency?

[shilman]

Probably due to #22552

[peschee]

Cool @shilman! Will this be released in a next 8.1.x version or also backported as a bugfix to previous versions?

[shilman]

This will be released in 8.1.1, probably within the next hour.