error[E0658]: custom discriminant values are not allowed in enums with tuple or struct variants --> $DIR/issue-17383.rs:2:9 | LL | A = 3, | ^ disallowed custom discriminant LL | LL | B(usize) | -------- tuple variant defined here | = note: see issue #60553 for more information = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable error: aborting due to previous error For more information about this error, try `rustc --explain E0658`.