error[E0412]: cannot find type `Missing` in this scope
  --> $DIR/unknown_src_field.rs:18:27
   |
LL |     #[repr(C)] struct Dst(Missing);
   |                           ^^^^^^^ not found in this scope

error[E0277]: `Src` cannot be safely transmuted into `Dst`
  --> $DIR/unknown_src_field.rs:19:36
   |
LL |     assert::is_transmutable::<Src, Dst>();
   |                                    ^^^ analyzing the transmutability of `Dst` is not yet supported
   |
note: required by a bound in `is_transmutable`
  --> $DIR/unknown_src_field.rs:12:14
   |
LL |     pub fn is_transmutable<Src, Dst>()
   |            --------------- required by a bound in this function
LL |     where
LL |         Dst: BikeshedIntrinsicFrom<Src>
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_transmutable`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0412.
For more information about an error, try `rustc --explain E0277`.