error[E0391]: cycle detected when expanding type alias `Node1Value`
 --> fail/interface/struct/attr_cyclic_impl.rs:3:46
  |
3 | #[graphql_interface(impl = Node2Value, for = Node2Value)]
  |                                              ^^^^^^^^^^
  |
note: ...which requires expanding type alias `Node2Value`...
 --> fail/interface/struct/attr_cyclic_impl.rs:8:46
  |
8 | #[graphql_interface(impl = Node1Value, for = Node1Value)]
  |                                              ^^^^^^^^^^
  = note: ...which again requires expanding type alias `Node1Value`, completing the cycle
  = note: type aliases cannot be recursive
  = help: consider using a struct, enum, or union instead to break the cycle
  = help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when computing type of `<impl at $DIR/fail/interface/struct/attr_cyclic_impl.rs:3:1: 3:58>`
 --> fail/interface/struct/attr_cyclic_impl.rs:3:1
  |
3 | #[graphql_interface(impl = Node2Value, for = Node2Value)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
  = note: this error originates in the attribute macro `graphql_interface` (in Nightly builds, run with -Z macro-backtrace for more info)