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error[E0375]: implementing the trait `CoerceUnsized` requires multiple coercions
--> $DIR/issue-26905.rs:16:40
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LL | impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<MyRc<U>> for MyRc<T>{ }
| ^^^^^^^^^^^^^^^^^^^^^^ requires multiple coercions
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= note: `CoerceUnsized` may only be implemented for a coercion between structures with one field being coerced
= note: currently, 2 fields need coercions: `_ptr` (`*const T` to `*const U`), `_boo` (`NotPhantomData<T>` to `NotPhantomData<U>`)
error: aborting due to previous error
For more information about this error, try `rustc --explain E0375`.
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