error[E0081]: discriminant value `1` already exists
  --> $DIR/issue-15524.rs:5:9
   |
LL |     A = 1,
   |         - first use of `1`
LL |     B = 1,
   |         ^ enum already has `1`

error[E0081]: discriminant value `1` already exists
  --> $DIR/issue-15524.rs:8:5
   |
LL |     A = 1,
   |         - first use of `1`
...
LL |     D,
   |     ^ enum already has `1`

error[E0081]: discriminant value `1` already exists
  --> $DIR/issue-15524.rs:11:9
   |
LL |     A = 1,
   |         - first use of `1`
...
LL |     E = N,
   |         ^ enum already has `1`

error: aborting due to 3 previous errors

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