error: functions tagged with `#[proc_macro]` must be `pub` --> $DIR/visibility-path.rs:12:1 | LL | pub(self) fn outer(input: TokenStream) -> TokenStream { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: functions tagged with `#[proc_macro]` must currently reside in the root of the crate --> $DIR/visibility-path.rs:21:5 | LL | pub(super) fn inner(input: TokenStream) -> TokenStream { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors