error: generic `Self` types are currently not permitted in anonymous constants --> $DIR/self-ty-in-const-2.rs:15:41 | LL | let _: [u8; std::mem::size_of::()]; | ^^^^ | note: not a concrete type --> $DIR/self-ty-in-const-2.rs:13:17 | LL | impl Baz for Bar { | ^^^^^^ error: aborting due to 1 previous error