error[E0038]: the trait `Foo` cannot be made into an object
  --> $DIR/span-bug-issue-121597.rs:14:23
   |
LL |     let x: &dyn Foo = &();
   |                       ^^^ `Foo` cannot be made into an object
   |
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  --> $DIR/span-bug-issue-121597.rs:4:12
   |
LL | trait Foo: for<T> Bar<T> {}
   |       ---  ^^^^^^^^^^^^^ ...because where clause cannot reference non-lifetime `for<...>` variables
   |       |
   |       this trait cannot be made into an object...
   = note: required for the cast from `&()` to `&dyn Foo`

error[E0038]: the trait `Foo` cannot be made into an object
  --> $DIR/span-bug-issue-121597.rs:14:12
   |
LL |     let x: &dyn Foo = &();
   |            ^^^^^^^^ `Foo` cannot be made into an object
   |
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  --> $DIR/span-bug-issue-121597.rs:4:12
   |
LL | trait Foo: for<T> Bar<T> {}
   |       ---  ^^^^^^^^^^^^^ ...because where clause cannot reference non-lifetime `for<...>` variables
   |       |
   |       this trait cannot be made into an object...

error[E0308]: mismatched types
  --> $DIR/span-bug-issue-121597.rs:18:15
   |
LL |     needs_bar(x);
   |     --------- ^ types differ in mutability
   |     |
   |     arguments to this function are incorrect
   |
   = note: expected raw pointer `*mut Type2`
                found reference `&dyn Foo`
note: function defined here
  --> $DIR/span-bug-issue-121597.rs:11:4
   |
LL | fn needs_bar(_: *mut Type2) {}
   |    ^^^^^^^^^ -------------

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0038, E0308.
For more information about an error, try `rustc --explain E0038`.