error: implementation of `Foo` is not general enough
  --> $DIR/hrtb-just-for-static.rs:24:5
   |
LL | / trait Foo<X> {
LL | |     fn foo(&self, x: X) { }
LL | | }
   | |_- trait `Foo` defined here
...
LL |       want_hrtb::<StaticInt>()
   |       ^^^^^^^^^^^^^^^^^^^^^^ implementation of `Foo` is not general enough
   |
   = note: `StaticInt` must implement `Foo<&'0 isize>`, for any lifetime `'0`...
   = note: ...but `StaticInt` actually implements `Foo<&'1 isize>`, for some specific lifetime `'1`

error: implementation of `Foo` is not general enough
  --> $DIR/hrtb-just-for-static.rs:30:5
   |
LL | / trait Foo<X> {
LL | |     fn foo(&self, x: X) { }
LL | | }
   | |_- trait `Foo` defined here
...
LL |       want_hrtb::<&'a u32>()
   |       ^^^^^^^^^^^^^^^^^^^^ implementation of `Foo` is not general enough
   |
   = note: `Foo<&'0 isize>` would have to be implemented for the type `&'a u32`, for any lifetime `'0`...
   = note: ...but `Foo<&'1 isize>` is actually implemented for the type `&'1 u32`, for some specific lifetime `'1`

error: aborting due to 2 previous errors