error[E0277]: the trait bound `for<'a> &'a _: Bar` is not satisfied
  --> $DIR/where-for-self-2.rs:21:5
   |
LL | fn foo<T>(x: &T)
   |    ---
LL |     where for<'a> &'a T: Bar
   |                          --- required by this bound in `foo`
...
LL |     foo(&X);
   |     ^^^ the trait `for<'a> Bar` is not implemented for `&'a _`
   |
   = help: the following implementations were found:
             <&'static u32 as Bar>

error: aborting due to previous error

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