error: lifetime may not live long enough
  --> $DIR/constant-in-expr-inherent-1.rs:8:5
   |
LL | fn foo<'a>(_: &'a u32) -> &'static u32 {
   |        -- lifetime `'a` defined here
LL |     <Foo<'a>>::C
   |     ^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`

error: aborting due to previous error