error[E0080]: evaluation of constant value failed
  --> $DIR/union-const-eval-field.rs:26:37
   |
LL |     const FIELD3: Field3 = unsafe { UNION.field3 };
   |                                     ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory

note: erroneous constant encountered
  --> $DIR/union-const-eval-field.rs:29:5
   |
LL |     FIELD3
   |     ^^^^^^

note: erroneous constant encountered
  --> $DIR/union-const-eval-field.rs:29:5
   |
LL |     FIELD3
   |     ^^^^^^
   |
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0080`.