error: implementation of `DistributedIteratorMulti` is not general enough
  --> $DIR/issue-55731.rs:48:5
   |
LL |     multi(Map {
   |     ^^^^^
   |
   = note: `DistributedIteratorMulti<&'0 ()>` would have to be implemented for the type `Cloned<&()>`, for any lifetime `'0`
   = note: but `DistributedIteratorMulti<&'1 ()>` is actually implemented for the type `Cloned<&'1 ()>`, for some specific lifetime `'1`

error: aborting due to previous error