1 error[E0038]: the trait `Foo` cannot be made into an object
2 --> $DIR/gat-in-trait-path.rs:21:17
4 LL | fn f(_arg : Box<dyn for<'a> Foo<A<'a> = &'a ()>>) {}
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Foo` 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/gat-in-trait-path.rs:5:10
11 | --- this trait cannot be made into an object...
12 LL | type A<'a> where Self: 'a;
13 | ^ ...because it contains the generic associated type `A`
14 = help: consider moving `A` to another trait
16 error: aborting due to previous error
18 For more information about this error, try `rustc --explain E0038`.