error[E0124]: field `field` is already declared
  --> $DIR/duplicated-fields-issue-125842.rs:6:5
   |
LL |     field: Option<u8>,
   |     ----------------- `field` first declared here
LL |     field: u8,
   |     ^^^^^^^^^ field already declared

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0124`.