error[E0412]: cannot find type `PhantomData` in this scope
  --> $DIR/issue-78372.rs:2:23
   |
LL | struct Smaht<T, MISC>(PhantomData);
   |                       ^^^^^^^^^^^ not found in this scope
   |
help: consider importing this struct
   |
LL | use std::marker::PhantomData;
   |

error[E0412]: cannot find type `U` in this scope
  --> $DIR/issue-78372.rs:3:31
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |      -                        ^
   |      |
   |      similarly named type parameter `T` defined here
   |
help: a type parameter with a similar name exists
   |
LL | impl<T> DispatchFromDyn<Smaht<T, MISC>> for T {}
   |                               ~
help: you might be missing a type parameter
   |
LL | impl<T, U> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |       +++

error[E0412]: cannot find type `MISC` in this scope
  --> $DIR/issue-78372.rs:3:34
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |                                  ^^^^ not found in this scope
   |
help: you might be missing a type parameter
   |
LL | impl<T, MISC> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |       ++++++

error[E0658]: use of unstable library feature 'dispatch_from_dyn'
  --> $DIR/issue-78372.rs:1:5
   |
LL | use std::ops::DispatchFromDyn;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(dispatch_from_dyn)]` to the crate attributes to enable

error[E0658]: use of unstable library feature 'dispatch_from_dyn'
  --> $DIR/issue-78372.rs:3:9
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(dispatch_from_dyn)]` to the crate attributes to enable

error[E0378]: the trait `DispatchFromDyn` may only be implemented for a coercion between structures
  --> $DIR/issue-78372.rs:3:1
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 6 previous errors

Some errors have detailed explanations: E0378, E0412, E0658.
For more information about an error, try `rustc --explain E0378`.