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();
LL +     let _ = std::collections::HashMap::with_capacity(_);
   |
LL -     let _ = std::collections::HashMap();
LL +     let _ = std::collections::HashMap::with_hasher(_);
   |
LL -     let _ = std::collections::HashMap();
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(U {
LL -             wtf: None,
LL -             x: (),
LL -         })),
LL +         wtf: Some(Box::new(_)),
   |
LL -         wtf: Some(Box(U {
LL -             wtf: None,
LL -             x: (),
LL -         })),
LL +         wtf: Some(Box::new_uninit()),
   |
LL -         wtf: Some(Box(U {
LL -             wtf: None,
LL -             x: (),
LL -         })),
LL +         wtf: Some(Box::new_zeroed()),
   |
LL -         wtf: Some(Box(U {
LL -             wtf: None,
LL -             x: (),
LL -         })),
LL +         wtf: Some(Box::new_in(_, _)),
   |
   = and 12 other candidates
help: consider using the `Default` trait
   |
LL -         wtf: Some(Box(U {
LL +         wtf: Some(<Box as std::default::Default>::default()),
   |

error: cannot construct `HashMap<_, _, _>` with struct literal syntax due to private fields
  --> $DIR/suggest-box-new.rs:16:13
   |
LL |     let _ = std::collections::HashMap {};
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: private field `base` that was not provided
help: you might have meant to use an associated function to build this type
   |
LL -     let _ = std::collections::HashMap {};
LL +     let _ = std::collections::HashMap::new();
   |
LL -     let _ = std::collections::HashMap {};
LL +     let _ = std::collections::HashMap::with_capacity(_);
   |
LL -     let _ = std::collections::HashMap {};
LL +     let _ = std::collections::HashMap::with_hasher(_);
   |
LL -     let _ = std::collections::HashMap {};
LL +     let _ = std::collections::HashMap::with_capacity_and_hasher(_, _);
   |
help: consider using the `Default` trait
   |
LL -     let _ = std::collections::HashMap {};
LL +     let _ = <std::collections::HashMap as std::default::Default>::default();
   |

error: cannot construct `Box<_, _>` with struct literal syntax due to private fields
  --> $DIR/suggest-box-new.rs:18:13
   |
LL |     let _ = Box {};
   |             ^^^
   |
   = note: private fields `0` and `1` that were not provided
help: you might have meant to use an associated function to build this type
   |
LL -     let _ = Box {};
LL +     let _ = Box::new(_);
   |
LL -     let _ = Box {};
LL +     let _ = Box::new_uninit();
   |
LL -     let _ = Box {};
LL +     let _ = Box::new_zeroed();
   |
LL -     let _ = Box {};
LL +     let _ = Box::new_in(_, _);
   |
   = and 13 other candidates
help: consider using the `Default` trait
   |
LL -     let _ = Box {};
LL +     let _ = <Box as std::default::Default>::default();
   |

error: cannot construct `Box<i32>` with struct literal syntax due to private fields
  --> $DIR/suggest-box-new.rs:21:13
   |
LL |     let _ = Box::<i32> {};
   |             ^^^^^^^^^^
   |
   = note: private fields `0` and `1` that were not provided
help: you might have meant to use an associated function to build this type
   |
LL -     let _ = Box::<i32> {};
LL +     let _ = Box::<i32>::new(_);
   |
LL -     let _ = Box::<i32> {};
LL +     let _ = Box::<i32>::new_in(_, _);
   |
LL -     let _ = Box::<i32> {};
LL +     let _ = Box::<i32>::into_inner(_);
   |
LL -     let _ = Box::<i32> {};
LL +     let _ = Box::<i32>::write(_, _);
   |
   = and 4 other candidates
help: consider using the `Default` trait
   |
LL -     let _ = Box::<i32> {};
LL +     let _ = <Box::<i32> as std::default::Default>::default();
   |

error: aborting due to 5 previous errors

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