Mismatch Test
=============

fn x() int {
    return 1;
}

=============

(source_file
  (function_definition
    (identifier: "y")
    (parameter_list)
    (primitive_type: "int")
    (block
      (inner_block
        (return_statement
          (number: "1")
        )
      )
    )
  )
)
