error: the `#[proc_macro_derive]` attribute is only usable with crates of the `proc-macro` crate type
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:16:5
   |
LL |     #[proc_macro_derive(Test)] fn f() { }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: `#[proc_macro_derive]` attribute cannot be used on modules
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:5:1
   |
LL | #[proc_macro_derive(Test)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: `#[proc_macro_derive]` attribute cannot be used on modules
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:8:17
   |
LL |     mod inner { #![proc_macro_derive(Test)] }
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: `#[proc_macro_derive]` attribute cannot be used on modules
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:13:17
   |
LL |     mod inner { #![proc_macro_derive(Test)] }
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: `#[proc_macro_derive]` attribute cannot be used on structs
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:19:5
   |
LL |     #[proc_macro_derive(Test)] struct S;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: `#[proc_macro_derive]` attribute cannot be used on type aliases
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:22:5
   |
LL |     #[proc_macro_derive(Test)] type T = S;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: `#[proc_macro_derive]` attribute cannot be used on inherent impl blocks
  --> $DIR/issue-43106-gating-of-proc_macro_derive.rs:25:5
   |
LL |     #[proc_macro_derive(Test)] impl S { }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[proc_macro_derive]` can only be applied to functions

error: aborting due to 7 previous errors