error[E0310]: the associated type `impl Fn()` may not live long enough
  --> $DIR/missing-static-bound-from-impl.rs:11:9
   |
LL |         Box::new(<T as Original>::f())
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |         |
   |         the associated type `impl Fn()` must be valid for the static lifetime...
   |         ...so that the type `impl Fn()` will meet its required lifetime bounds

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0310`.