error[E0637]: `'_` cannot be used here
  --> $DIR/issue-70304.rs:46:41
   |
LL | fn create_doc() -> impl Document<Cursor<'_> = DocCursorImpl<'_>> {
   |                                         ^^ `'_` is a reserved lifetime name

error[E0106]: missing lifetime specifier
  --> $DIR/issue-70304.rs:46:61
   |
LL | fn create_doc() -> impl Document<Cursor<'_> = DocCursorImpl<'_>> {
   |                                                             ^^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime
   |
LL | fn create_doc() -> impl Document<Cursor<'_> = DocCursorImpl<'static>> {
   |                                                             ~~~~~~~

error: missing required bound on `Cursor`
  --> $DIR/issue-70304.rs:2:5
   |
LL |     type Cursor<'a>: DocCursor<'a>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
   |                                   |
   |                                   help: add the required where clause: `where Self: 'a`
   |
   = note: this bound is currently required to ensure that impls have maximum flexibility
   = note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0106, E0637.
For more information about an error, try `rustc --explain E0106`.