error[E0107]: missing generics for struct `Vec`
  --> $DIR/generic-type-less-params-with-defaults.rs:11:12
   |
LL |     let _: Vec;
   |            ^^^ expected at least 1 generic argument
   |
note: struct defined here, with at least 1 generic parameter: `T`
  --> $DIR/generic-type-less-params-with-defaults.rs:5:8
   |
LL | struct Vec<T, A = Heap>(
   |        ^^^ -
help: add missing generic argument
   |
LL |     let _: Vec<T>;
   |               +++

error[E0107]: missing generics for struct `HashMap`
  --> $DIR/generic-type-less-params-with-defaults.rs:15:32
   |
LL |     let _x = (1..10).collect::<HashMap>();
   |                                ^^^^^^^ expected at least 2 generic arguments
   |
note: struct defined here, with at least 2 generic parameters: `K`, `V`
  --> $DIR/generic-type-less-params-with-defaults.rs:8:8
   |
LL | struct HashMap<K, V, S = ()>(marker::PhantomData<(K,V,S)>);
   |        ^^^^^^^ -  -
help: add missing generic arguments
   |
LL |     let _x = (1..10).collect::<HashMap<_, _>>();
   |                                       ++++++

error[E0107]: missing generics for struct `Vec`
  --> $DIR/generic-type-less-params-with-defaults.rs:21:20
   |
LL |             let _: Vec;
   |                    ^^^ expected at least 1 generic argument
   |
note: struct defined here, with at least 1 generic parameter: `T`
  --> $DIR/generic-type-less-params-with-defaults.rs:5:8
   |
LL | struct Vec<T, A = Heap>(
   |        ^^^ -
help: add missing generic argument
   |
LL |             let _: Vec<T>;
   |                       +++

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0107`.