error[E0658]: `for` is not allowed in a `const` --> $DIR/issue-50582.rs:2:20 | LL | Vec::<[(); 1 + for x in 0..1 {}]>::new(); | ^^^^^^^^^^^^^^^^ | = note: see issue #87575 <https://github.com/rust-lang/rust/issues/87575> for more information = help: add `#![feature(const_for)]` to the crate attributes to enable error[E0277]: cannot add `()` to `{integer}` --> $DIR/issue-50582.rs:2:18 | LL | Vec::<[(); 1 + for x in 0..1 {}]>::new(); | ^ no implementation for `{integer} + ()` | = help: the trait `Add<()>` is not implemented for `{integer}` = help: the following other types implement trait `Add<Rhs>`: <&'a f32 as Add<f32>> <&'a f64 as Add<f64>> <&'a i128 as Add<i128>> <&'a i16 as Add<i16>> <&'a i32 as Add<i32>> <&'a i64 as Add<i64>> <&'a i8 as Add<i8>> <&'a isize as Add<isize>> and 48 others error: aborting due to 2 previous errors Some errors have detailed explanations: E0277, E0658. For more information about an error, try `rustc --explain E0277`.