error[E0658]: `#[track_caller]` on closures is currently unstable --> $DIR/feature-gate-closure_track_caller.rs:6:20 | LL | let _closure = #[track_caller] || {}; | ^^^^^^^^^^^^^^^ | = note: see issue #87417 for more information = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable error[E0658]: `#[track_caller]` on closures is currently unstable --> $DIR/feature-gate-closure_track_caller.rs:7:22 | LL | let _coroutine = #[track_caller] || { yield; }; | ^^^^^^^^^^^^^^^ | = note: see issue #87417 for more information = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable error[E0658]: `#[track_caller]` on closures is currently unstable --> $DIR/feature-gate-closure_track_caller.rs:8:19 | LL | let _future = #[track_caller] async {}; | ^^^^^^^^^^^^^^^ | = note: see issue #87417 for more information = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0658`.