[Bug]: `v5` - using `tags` for individual stories causes error

[bhvngt]

Describe the bug

When v5 of this addon is used, using tags for individual stories causes crash.

Steps to reproduce the behavior

Here's the reproduction of this issue.

Note: For some unknown reason, stackblitz does not save .storybook folder. Hence, storybook init will have to be run to render storybook

Make following changes to src/stories/Button.stories.svelte file

<Story name="Secondary" tags={["!dev"]}/>

Expected behavior

Expecting Secondary story to disappear from storybook sidebar.

Screenshots and/or logs

[xeho91]

Hey @bhvngt, thank you for testing out v5 ❤️ and spotting this bug! I confirm I was able to reproduce the issue.

@JReinhold You could extract more info from the console in web browser dev tools.

I handpicked a few:

13:28:28.957 runtime.js:8446 

       GET https://sveltejskittemplatedefaultbxes-hfev--6006--60a75bde.local-credentialless.webcontainer.io/index.json 500 (Internal Server Error)
getStoryIndexFromServer @ runtime.js:8446
initializeWithProjectAnnotations @ runtime.js:8432
initialize @ runtime.js:8406
await in initialize
PreviewWithSelection @ runtime.js:8934
PreviewWeb @ runtime.js:9365
(anonymous) @ vite-app.js:23

13:28:28.957 runtime.js:4708 Error loading story index:
error @ runtime.js:4708
renderPreviewEntryError @ runtime.js:8615
renderPreviewEntryError @ runtime.js:9118
initializeWithProjectAnnotations @ runtime.js:8435
await in initializeWithProjectAnnotations
initialize @ runtime.js:8406
await in initialize
PreviewWithSelection @ runtime.js:8934
PreviewWeb @ runtime.js:9365
(anonymous) @ vite-app.js:23

13:28:28.957 runtime.js:4708 SB_PREVIEW_API_0006 (StoryIndexFetchError): Error fetching `/index.json`:

TypeError: Cannot read properties of undefined (reading 'type')

If you are in development, this likely indicates a problem with your Storybook process,
check the terminal for errors.

If you are in a deployed Storybook, there may have been an issue deploying the full Storybook
build.
    at ts.getStoryIndexFromServer (https://sveltejskittemplatedefaultbxes-hfev--6006--60a75bde.local-credentialless.webcontainer.io/sb-preview/runtime.js:8449:11)
    at async ts.initializeWithProjectAnnotations (https://sveltejskittemplatedefaultbxes-hfev--6006--60a75bde.local-credentialless.webcontainer.io/sb-preview/runtime.js:8432:15)
    at async ts.initialize (https://sveltejskittemplatedefaultbxes-hfev--6006--60a75bde.local-credentialless.webcontainer.io/sb-preview/runtime.js:8406:39)
error @ runtime.js:4708
renderPreviewEntryError @ runtime.js:8615
renderPreviewEntryError @ runtime.js:9118
initializeWithProjectAnnotations @ runtime.js:8435
await in initializeWithProjectAnnotations
initialize @ runtime.js:8406
await in initialize
PreviewWithSelection @ runtime.js:8934
PreviewWeb @ runtime.js:9365
(anonymous) @ vite-app.js:23
13:28:28.959 runtime.js:8446 Fetch failed loading: GET "https://sveltejskittemplatedefaultbxes-hfev--6006--60a75bde.local-credentialless.webcontainer.io/index.json".
getStoryIndexFromServer @ runtime.js:8446
initializeWithProjectAnnotations @ runtime.js:8432
initialize @ runtime.js:8406
await in initialize
PreviewWithSelection @ runtime.js:8934
PreviewWeb @ runtime.js:9365
(anonymous) @ vite-app.js:23

Is it possible that it could be an upstream issue in @storybook/preview-api?

[JReinhold]

I'm looking into this.

[bhvngt]

Thanks @JReinhold