error: types with lifetimes or generics aren't allowed
 --> $DIR/improper_types.rs:8:17
  |
8 | fn test(_arg_1: Box<i32>) {}
  |                 ^^^

error: types with lifetimes or generics aren't allowed
  --> $DIR/improper_types.rs:11:27
   |
11 | fn test2(_arg_1: std::rc::Rc<i32>) {}
   |                           ^^

error: types with lifetimes or generics aren't allowed
  --> $DIR/improper_types.rs:14:36
   |
14 | fn test3(_arg_1: std::collections::HashMap<i32, String>) {}
   |                                    ^^^^^^^

error: Incorrect argument type, only path or reference are available on this position
  --> $DIR/improper_types.rs:17:26
   |
17 | fn test4(_arg_1: i32) -> (i32, i32) {
   |                          ^^^^^^^^^^

error: types with lifetimes or generics aren't allowed
  --> $DIR/improper_types.rs:22:26
   |
22 | fn test5(_arg_1: i32) -> Box<i32> {
   |                          ^^^