error[E0081]: discriminant value `3` assigned more than once
  --> $DIR/E0081.rs:1:1
   |
LL | enum Enum {
   | ^^^^^^^^^
LL |
LL |     P = 3,
   |         - first assignment of `3`
LL |
LL |     X = 3,
   |         - second assignment of `3`

error[E0081]: discriminant value `1` assigned more than once
  --> $DIR/E0081.rs:11:1
   |
LL | enum EnumOverflowRepr {
   | ^^^^^^^^^^^^^^^^^^^^^
LL |
LL |     P = 257,
   |         --- first assignment of `1` (overflowed from `257`)
LL |
LL |     X = 513,
   |         --- second assignment of `1` (overflowed from `513`)

error[E0081]: discriminant value `-1` assigned more than once
  --> $DIR/E0081.rs:20:1
   |
LL | enum NegDisEnum {
   | ^^^^^^^^^^^^^^^
LL |
LL |     First = -1,
   |             -- first assignment of `-1`
LL |
LL |     Second = -2,
   |     ----------- assigned discriminant for `Last` was incremented from this discriminant
LL |
LL |     Last,
   |     ---- second assignment of `-1`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0081`.