| error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now | |
| --> $DIR/syntax-trait-polarity-feature-gate.rs:7:1 | |
| | | |
| LL | impl !Send for TestType {} | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
| | | |
| = note: for more information, see https://github.com/rust-lang/rust/issues/13231 | |
| = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |