1 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
2 --> $DIR/custom_attribute.rs:3:3
4 LL | #[foo] //~ ERROR The attribute `foo`
7 = help: add #![feature(custom_attribute)] to the crate attributes to enable
9 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
10 --> $DIR/custom_attribute.rs:5:7
12 LL | #[foo] //~ ERROR The attribute `foo`
15 = help: add #![feature(custom_attribute)] to the crate attributes to enable
17 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
18 --> $DIR/custom_attribute.rs:7:7
20 LL | #[foo] //~ ERROR The attribute `foo`
23 = help: add #![feature(custom_attribute)] to the crate attributes to enable
25 error: aborting due to 3 previous errors
27 For more information about this error, try `rustc --explain E0658`.