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