E0433 should not purely rely on letter case to report different error.

[crlf0710]

I've seen this:

error[E0433]: failed to resolve: use of undeclared crate or module `kern_node_subtype`

However kern_node_subtype is actually an enum type. In this crate i #[allow(non_camel_case_types)]. Since this is an error message not a suggestion i think it would be best if this could be improved somehow.

[estebank]

We can't know what item type you're trying to access because it couldn't find it, so the diagnostic infers what it might have been from the style of the used name. I don't see how we would be able to improve here.

[fee1-dead]

The error could include a message which tells users that enum types/structs are not supposed to be snake cased. Would that work @crlf0710?

[crlf0710]

@fee1-dead It would also be great if there's usual suggestions. It seems the casing currently suppress the auto lookup for types that lives in a different module.