error: vtable entries for ``: [ MetadataDropInPlace, MetadataSize, MetadataAlign, Method(::foo_a), Method(::foo_b), Method(::foo_c), TraitVPtr(), Method(::foo_d), ] --> $DIR/vtable-diamond.rs:21:1 | LL | trait D: B + C { | ^^^^^^^^^^^^^^ error: vtable entries for ``: [ MetadataDropInPlace, MetadataSize, MetadataAlign, Method(::foo_a), Method(::foo_c), ] --> $DIR/vtable-diamond.rs:15:1 | LL | trait C: A { | ^^^^^^^^^^ error: aborting due to 2 previous errors