Regression from stable: "Unexpected tail in unsized_info_ty" #42210
Description
There's been a regression in a recent nightly regarding dispatch on unsized types:
trait Foo {
fn foo() { }
}
struct Bar;
trait Baz {
}
impl Foo for (Bar, Baz) { }
fn main() {
<(Bar, Baz) as Foo>::foo()
}