1 error[E0605]: non-primitive cast: `E` as `isize`
2 --> $DIR/uninhabited-enum-cast.rs:4:20
4 LL | println!("{}", (e as isize).to_string()); //~ ERROR non-primitive cast
7 = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0605`.