error[E0277]: the trait bound `[(); 0]: Foo` is not satisfied --> $DIR/unevaluated_fixed_size_array_len.rs:12:5 | LL | <[(); 0] as Foo>::foo() | ^^^^^^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `[(); 0]` | = help: the trait `Foo` is implemented for `[(); 1]` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.