// Check that we do not allow casts or coercions // to dyn-incompatible trait objects by ref #![feature(dyn_compatible_for_dispatch)] trait Trait: Sized {} struct S; impl Trait for S {} fn takes_trait(t: &dyn Trait) {} fn main() { &S as &dyn Trait; //~ ERROR E0038 let t: &dyn Trait = &S; //~ ERROR E0038 takes_trait(&S); //~ ERROR E0038 }