error[E0423]: expected function, tuple struct or tuple variant, found struct `std::collections::HashMap`
  --> $DIR/suggest-box-new.rs:14:13
   |
LL |     let _ = std::collections::HashMap();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  --> $SRC_DIR/std/src/collections/hash/map.rs:LL:COL
   |
   = note: `std::collections::HashMap` defined here
   |
help: you might have meant to use an associated function to build this type
   |
LL |     let _ = std::collections::HashMap::new();
   |                                      +++++
LL |     let _ = std::collections::HashMap::with_capacity();
   |                                      +++++++++++++++
LL |     let _ = std::collections::HashMap::with_hasher();
   |                                      +++++++++++++
LL |     let _ = std::collections::HashMap::with_capacity_and_hasher();
   |                                      ++++++++++++++++++++++++++
help: consider using the `Default` trait
   |
LL |     let _ = <std::collections::HashMap as std::default::Default>::default();
   |             +                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error[E0423]: cannot initialize a tuple struct which contains private fields
  --> $DIR/suggest-box-new.rs:8:19
   |
LL |         wtf: Some(Box(U {
   |                   ^^^
   |
note: constructor is not visible here due to private fields
  --> $SRC_DIR/alloc/src/boxed.rs:LL:COL
   |
   = note: private field
   |
   = note: private field
help: you might have meant to use an associated function to build this type
   |
LL |         wtf: Some(Box::new(U {
   |                      +++++
LL |         wtf: Some(Box::new_uninit(U {
   |                      ++++++++++++
LL |         wtf: Some(Box::new_zeroed(U {
   |                      ++++++++++++
LL |         wtf: Some(Box::new_in(U {
   |                      ++++++++
     and 10 other candidates
help: consider using the `Default` trait
   |
LL |         wtf: Some(<Box as std::default::Default>::default()),
   |                   +    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0423`.