error: unit structs are not supported
 --> tests/ui/multiple_parse_error.rs:3:5
  |
3 |     struct Monad<T>;
  |     ^^^^^^^^^^^^^^^^

error: unrecognized ABI, requires either "C++" or "Rust"
 --> tests/ui/multiple_parse_error.rs:5:5
  |
5 |     extern "Haskell" {}
  |     ^^^^^^^^^^^^^^^^