1 error[E0658]: The attribute `a` is currently unknown to the compiler and may have meaning added to it in the future
2 --> $DIR/proc-macro-gates2.rs:13:11
4 LL | fn _test6<#[a] T>() {}
7 = note: for more information, see https://github.com/rust-lang/rust/issues/29642
8 = help: add #![feature(custom_attribute)] to the crate attributes to enable
10 error[E0658]: The attribute `a` is currently unknown to the compiler and may have meaning added to it in the future
11 --> $DIR/proc-macro-gates2.rs:18:9
16 = note: for more information, see https://github.com/rust-lang/rust/issues/29642
17 = help: add #![feature(custom_attribute)] to the crate attributes to enable
19 error: aborting due to 2 previous errors
21 For more information about this error, try `rustc --explain E0658`.