1 error[E0658]: the `#[collapse_debuginfo]` attribute is an experimental feature
2 --> $DIR/feature-gate-collapse_debuginfo.rs:1:1
4 LL | #[collapse_debuginfo]
5 | ^^^^^^^^^^^^^^^^^^^^^
7 = note: see issue #100758 <https://github.com/rust-lang/rust/issues/100758> for more information
8 = help: add `#![feature(collapse_debuginfo)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.