warning: the feature `const_generics` is incomplete and may cause the compiler to crash --> $DIR/broken-mir-2.rs:1:12 | LL | #![feature(const_generics)] | ^^^^^^^^^^^^^^ | = note: `#[warn(incomplete_features)]` on by default error[E0277]: arrays only have std trait implementations for lengths 0..=32 --> $DIR/broken-mir-2.rs:7:36 | LL | struct S([T; N]); | ^^^^^^ the trait `std::array::LengthAtMost32` is not implemented for `[T; _]` | = note: required because of the requirements on the impl of `std::fmt::Debug` for `[T; _]` = note: required because of the requirements on the impl of `std::fmt::Debug` for `&[T; _]` = note: required for the cast to the object type `dyn std::fmt::Debug` = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.