1 error[E0658]: scoped lint `clippy::assign_ops` is experimental (see issue #44690)
2 --> $DIR/feature-gate-tool_lints-fail.rs:11:8
4 LL | #[warn(clippy::assign_ops)] //~ ERROR scoped lint `clippy::assign_ops` is experimental
7 = help: add #![feature(tool_lints)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.