error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
  --> $DIR/constant-in-expr-inherent-1.rs:8:5
   |
LL |     <Foo<'a>>::C
   |     ^^^^^^^^^^^^
   |
note: first, the lifetime cannot outlive the lifetime `'a` as defined on the function body at 7:8...
  --> $DIR/constant-in-expr-inherent-1.rs:7:8
   |
LL | fn foo<'a>(_: &'a u32) -> &'static u32 {
   |        ^^
note: ...so that the types are compatible
  --> $DIR/constant-in-expr-inherent-1.rs:8:5
   |
LL |     <Foo<'a>>::C
   |     ^^^^^^^^^^^^
   = note: expected  `Foo<'_>`
              found  `Foo<'a>`
   = note: but, the lifetime must be valid for the static lifetime...
note: ...so that reference does not outlive borrowed content
  --> $DIR/constant-in-expr-inherent-1.rs:8:5
   |
LL |     <Foo<'a>>::C
   |     ^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0495`.