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error[E0412]: cannot find type `Missing` in this scope
  --> $DIR/unknown_src_field.rs:20:27
   |
LL |     #[repr(C)] struct Dst(Missing);
   |                           ^^^^^^^ not found in this scope

error[E0277]: `Src` cannot be safely transmuted into `Dst` in the defining scope of `should_gracefully_handle_unknown_dst_field::Context`
  --> $DIR/unknown_src_field.rs:21:36
   |
LL |     assert::is_transmutable::<Src, Dst, Context>();
   |                                    ^^^ `Dst` has an unknown layout
   |
note: required by a bound in `is_transmutable`
  --> $DIR/unknown_src_field.rs:13:14
   |
LL |     pub fn is_transmutable<Src, Dst, Context>()
   |            --------------- required by a bound in this function
LL |     where
LL |         Dst: BikeshedIntrinsicFrom<Src, Context>
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 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`.