error[E0658]: non-builtin inner attributes are unstable
  --> $DIR/proc-macro-gates.rs:11:5
   |
LL |     #![a]
   |     ^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54726
   = help: add #![feature(custom_inner_attributes)] to the crate attributes to enable

error[E0658]: non-builtin inner attributes are unstable
  --> $DIR/proc-macro-gates.rs:18:5
   |
LL |     #![a]
   |     ^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54726
   = help: add #![feature(custom_inner_attributes)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to modules
  --> $DIR/proc-macro-gates.rs:14:1
   |
LL | #[a]
   | ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to modules
  --> $DIR/proc-macro-gates.rs:18:5
   |
LL |     #![a]
   |     ^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error: custom attribute invocations must be of the form #[foo] or #[foo(..)], the macro name must only be followed by a delimiter token
  --> $DIR/proc-macro-gates.rs:22:1
   |
LL | #[a = "y"]
   | ^^^^^^^^^^

error[E0658]: custom attributes cannot be applied to statements
  --> $DIR/proc-macro-gates.rs:31:5
   |
LL |     #[a]
   |     ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to statements
  --> $DIR/proc-macro-gates.rs:35:5
   |
LL |     #[a]
   |     ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to statements
  --> $DIR/proc-macro-gates.rs:39:5
   |
LL |     #[a]
   |     ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to expressions
  --> $DIR/proc-macro-gates.rs:43:14
   |
LL |     let _x = #[a] 2;
   |              ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to expressions
  --> $DIR/proc-macro-gates.rs:46:15
   |
LL |     let _x = [#[a] 2];
   |               ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: custom attributes cannot be applied to expressions
  --> $DIR/proc-macro-gates.rs:49:14
   |
LL |     let _x = #[a] println!();
   |              ^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to types
  --> $DIR/proc-macro-gates.rs:53:13
   |
LL |     let _x: m!(u32) = 3;
   |             ^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to patterns
  --> $DIR/proc-macro-gates.rs:54:12
   |
LL |     if let m!(Some(_x)) = Some(3) {}
   |            ^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to statements
  --> $DIR/proc-macro-gates.rs:56:5
   |
LL |     m!(struct S;);
   |     ^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to statements
  --> $DIR/proc-macro-gates.rs:57:5
   |
LL |     m!(let _x = 3;);
   |     ^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to expressions
  --> $DIR/proc-macro-gates.rs:59:14
   |
LL |     let _x = m!(3);
   |              ^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error[E0658]: procedural macros cannot be expanded to expressions
  --> $DIR/proc-macro-gates.rs:60:15
   |
LL |     let _x = [m!(3)];
   |               ^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/54727
   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable

error: aborting due to 17 previous errors

For more information about this error, try `rustc --explain E0658`.