error[E0277]: the trait bound `A: Deref` is not satisfied
  --> $DIR/issue-25901.rs:4:24
   |
LL | static S: &'static B = &A;
   |                        ^^ the trait `~const Deref` is not implemented for `A`
   |
note: the trait `Deref` is implemented for `A`, but that implementation is not `const`
  --> $DIR/issue-25901.rs:4:24
   |
LL | static S: &'static B = &A;
   |                        ^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.