| error[E0658]: use of unstable library feature 'structural_match' |
| --> $DIR/feature-gate.rs:29:6 |
| | |
| LL | impl std::marker::StructuralPartialEq for Foo { } |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: see issue #31434 <https://github.com/rust-lang/rust/issues/31434> for more information |
| = help: add `#![feature(structural_match)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0658`. |
