src/test/ui/issues/issue-21174.stderr

   1 error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
   2   --> $DIR/issue-21174.rs:7:30
   3    |
   4 LL |     let new: T::B = unsafe { std::mem::transmute(value) };
   5    |                              ^^^^^^^^^^^^^^^^^^^
   6    |
   7    = note: source type: `<T as Trait>::A` (this type does not have a fixed size)
   8    = note: target type: `<T as Trait>::B` (this type does not have a fixed size)
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0512`.