error[E0107]: missing generics for struct `Box`
  --> $DIR/issue-14092.rs:1:11
   |
LL | fn fn1(0: Box) {}
   |           ^^^ expected at least 1 generic argument
   |
help: add missing generic argument
   |
LL | fn fn1(0: Box<T>) {}
   |              +++

error: aborting due to previous error

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