compiler error: this shouldn't happen! generated code is trying to use inexistent internal

[btakita]

This occurs with an A component that takes a href property that contains "mailto:".

https://svelte.dev/repl/90d5d66d0ad64c0397129a035cd906a5?version=3.6.4

[btk5h]

Another repro.

This happens with any component (not element) with children and a prop containing an @ symbol not followed by an internal compiler method.

[mrkishi]

Yikes, sorry about that. That was me on #2963, although it is catching a compiler bug. PR incoming.

[Conduitry]

Similar to #3114. It looks like this one is because of the // (5:0) <Component anyProp="@contains_at_symbol"> comment not having the @ symbol escaped. (This does mean that, prior to 3.6.0, we were dropping a @ from any such comment - REPL - which is also a bug, but a much less serious one.) It's interesting that this comment is only generated when the component has slotted child content being passed into it - this is why the error only appears in that case.

[btakita]

: also needs to be escaped.

[Conduitry]

Where does : need to be escaped? What component is either failing to compile or producing incorrect output?

[btakita]

You're right. I thought mailto: caused an issue, but didn't check in the repl.