error: `impl Trait` can only mention lifetimes from an fn or impl
  --> $DIR/universal_wrong_hrtb.rs:5:73
   |
LL | fn test_argument_position(x: impl for<'a> Trait<'a, Assoc = impl Copy + 'a>) {}
   |                                       -- lifetime declared here         ^^

error: aborting due to previous error