src/test/ui/issues/issue-18959.stderr

   1 error[E0038]: the trait `Bar` cannot be made into an object
   2   --> $DIR/issue-18959.rs:11:12
   3    |
   4 LL | fn foo(b: &dyn Bar) {
   5    |            ^^^^^^^ `Bar` cannot be made into an object
   6    |
   7    = help: consider moving `foo` to another trait
   8 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>
   9   --> $DIR/issue-18959.rs:1:20
  10    |
  11 LL | pub trait Foo { fn foo<T>(&self, ext_thing: &T); }
  12    |                    ^^^ ...because method `foo` has generic type parameters
  13 LL | pub trait Bar: Foo { }
  14    |           --- this trait cannot be made into an object...
  15
  16 error: aborting due to previous error
  17
  18 For more information about this error, try `rustc --explain E0038`.