1 error[E0658]: the `#[register_tool]` attribute is an experimental feature
2 --> $DIR/feature-gate-register_tool.rs:1:1
4 LL | #![register_tool(tool)]
5 | ^^^^^^^^^^^^^^^^^^^^^^^
7 = note: see issue #66079 <https://github.com/rust-lang/rust/issues/66079> for more information
8 = help: add `#![feature(register_tool)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.