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error[E0038]: the trait `Bar` cannot be made into an object
--> $DIR/issue-72410.rs:14:19
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LL | where for<'a> &'a mut [dyn Bar]: ;
| ^^^^^^^^^^^^^^^^^ `Bar` cannot be made into an object
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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>
--> $DIR/issue-72410.rs:13:8
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LL | pub trait Bar {
| --- this trait cannot be made into an object...
LL | fn map()
| ^^^ ...because associated function `map` has no `self` parameter
help: consider turning `map` into a method by giving it a `&self` argument
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LL | fn map(&self)
| +++++
help: alternatively, consider constraining `map` so it does not apply to trait objects
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LL | where for<'a> &'a mut [dyn Bar]:, Self: Sized ;
| +++++++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0038`.
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