1 error[E0038]: the trait `Bar` cannot be made into an object
2 --> $DIR/issue-72410.rs:14:19
4 LL | where for<'a> &'a mut [dyn Bar]: ;
5 | ^^^^^^^^^^^^^^^^^ `Bar` cannot be made into an object
7 note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
8 --> $DIR/issue-72410.rs:13:8
11 | --- this trait cannot be made into an object...
13 | ^^^ ...because associated function `map` has no `self` parameter
14 help: consider turning `map` into a method by giving it a `&self` argument
18 help: alternatively, consider constraining `map` so it does not apply to trait objects
20 LL | where for<'a> &'a mut [dyn Bar]:, Self: Sized ;
23 error: aborting due to previous error
25 For more information about this error, try `rustc --explain E0038`.