error: impl method assumes more implied bounds than the corresponding trait method
  --> $DIR/impl-implied-bounds-compatibility.rs:14:5
   |
LL |     fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #105572 <https://github.com/rust-lang/rust/issues/105572>
note: the lint level is defined here
  --> $DIR/impl-implied-bounds-compatibility.rs:1:9
   |
LL | #![deny(implied_bounds_entailment)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error