MARKLESS_REPEAT_COLLECTION_UNREADABLE

This @for collection reaches no cell on its shared instance: a Markless compiler error.

Error from the compiler, while it builds your .tsrx files.

What happened

Markless prints the message, the reason, and a suggestion:

MARKLESS_REPEAT_COLLECTION_UNREADABLE: @for (const <itemName> of <collectionSource>) reads through `<rootName>`, a shared instance local of this component, but `<collectionSource>` resolves to no graph cell. `<rootName>` exists only inside the component function, so the rows would be taken from an expression that names nothing where the repeat renders.
Rows come from a reactive graph read; a shared-instance path that resolves to no cell leaves the repeat with an authored expression whose receiver is undeclared in the emitted scope, which throws on the first server render.
Return the cell as a property of a spread object from the shared factory, so `<collectionSource>` names a graph cell. Before: `shared(() => { const box = state({ items: [] }); return box; })`; after: `shared(() => { const box = state({ items: [] }); return { ...box }; })`.
https://markless.dev/errors/MARKLESS_REPEAT_COLLECTION_UNREADABLE

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Where it comes from

@markless/compiler raises this code. Source:

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