error[E0124]: field `field1` is already declared
  --> $DIR/E0124.rs:3:5
   |
LL |     field1: i32,
   |     ----------- `field1` first declared here
LL |     field1: i32,
   |     ^^^^^^^^^^^ field already declared

error: aborting due to 1 previous error

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