error[E0658]: `async` blocks are not allowed in constants --> $DIR/async-block.rs:12:47 | LL | const _: i32 = { core::mem::ManuallyDrop::new(async { 0 }); 4 }; | ^^^^^^^^^^^ | = note: see issue #85368 for more information = help: add `#![feature(const_async_blocks)]` to the crate attributes to enable = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date error[E0658]: `async` blocks are not allowed in statics --> $DIR/async-block.rs:15:51 | LL | static _FUT: &(dyn Future + Sync) = &async {}; | ^^^^^^^^ | = note: see issue #85368 for more information = help: add `#![feature(const_async_blocks)]` to the crate attributes to enable = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0658`.