error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied --> $DIR/issue-89118.rs:19:8 | LL | C: StackContext, | ^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()` | note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>` --> $DIR/issue-89118.rs:5:23 | LL | impl BufferUdpStateContext for C {} | ^^^^^^^^^^^^^^^^^^^^^^^^ ^ note: required by a bound in `StackContext` --> $DIR/issue-89118.rs:9:14 | LL | trait StackContext | ------------ required by a bound in this LL | where LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>, | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext` error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied --> $DIR/issue-89118.rs:29:9 | LL | impl EthernetWorker {} | ^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()` | note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>` --> $DIR/issue-89118.rs:5:23 | LL | impl BufferUdpStateContext for C {} | ^^^^^^^^^^^^^^^^^^^^^^^^ ^ note: required by a bound in `EthernetWorker` --> $DIR/issue-89118.rs:28:14 | LL | struct EthernetWorker(C) | -------------- required by a bound in this LL | where LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `EthernetWorker` error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied --> $DIR/issue-89118.rs:22:20 | LL | type Handler = Ctx; | ^^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()` | note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>` --> $DIR/issue-89118.rs:5:23 | LL | impl BufferUdpStateContext for C {} | ^^^^^^^^^^^^^^^^^^^^^^^^ ^ note: required by a bound in `StackContext` --> $DIR/issue-89118.rs:9:14 | LL | trait StackContext | ------------ required by a bound in this LL | where LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>, | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext` error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0277`.