error[E0623]: lifetime mismatch
  --> $DIR/hrlt-implied-trait-bounds-guard.rs:29:29
   |
LL | fn badboi<'in_, 'out, T>(x: Foo<'in_, 'out, T>, sadness: &'in_ T) -> &'out T {
   |                             ^^^^^^^^^^^^^^^^^^                       -------
   |                             |
   |                             this parameter and the return type are declared with different lifetimes...
   |                             ...but data from `x` is returned here

error: aborting due to previous error

For more information about this error, try `rustc --explain E0623`.