<svelte:component this={null}/> fails in SSR mode

[Rich-Harris]

In the REPL, we get an error —

missingComponent is not defined

— and in my local project I'm seeing

_WEBPACK_GARBLE___default.a.data is not a function

[Rich-Harris]

ah, I misunderstood the error. It's caused by an SSR component trying to render a child DOM component (i.e. the webpack config is excluding external modules, so pkg.main is being imported instead of pkg.svelte).

Perhaps Svelte should try and detect this situation and offer a more meaningful error. It won't be able to tell people exactly what to do, but it could point them in the right direction.

The REPL bug is still mysterious though.

[Conduitry]

Are you still seeing the REPL bug? Everything looks to be working fine to me.

[Conduitry]

Closing this, I don't think there's anything else to do here beyond #1606.