| = note: the only supported types are integers, `bool` and `char` <del> error: aborting due to 4 previous errors; 1 warning emitted </del> <ins> error: associated item referring to unboxed trait object for its own trait --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:44 | LL | trait Trait<const N: Trait = bar> { |       ----- in this trait ... LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |                                            ^^^^^ | help: you might have meant to use `Self` to refer to the implementing type | LL |     fn fnc<const N: Trait = u32>(&self) -> Self { |                                            ~~~~ warning: trait objects without an explicit `dyn` are deprecated --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21 | LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |                     ^^^^^ | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html> = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` help: if this is an object-safe trait, use `dyn` | LL |     fn fnc<const N: dyn Trait = u32>(&self) -> Trait { |                     +++ error[E0038]: the trait `Trait` cannot be made into an object --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21 | LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |                     ^^^^^ `Trait` cannot be made into an object | 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/ice-hir-wf-check-anon-const-issue-122199.rs:13:8 | LL | trait Trait<const N: Trait = bar> { |       ----- this trait cannot be made into an object... ... LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |        ^^^ ...because method `fnc` has generic type parameters = help: consider moving `fnc` to another trait error[E0038]: the trait `Trait` cannot be made into an object --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:13 | LL | trait Trait<const N: Trait = bar> { |             ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object | 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/ice-hir-wf-check-anon-const-issue-122199.rs:13:8 | LL | trait Trait<const N: Trait = bar> { |       ----- this trait cannot be made into an object... ... LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |        ^^^ ...because method `fnc` has generic type parameters = help: consider moving `fnc` to another trait = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21 | LL |     fn fnc<const N: Trait = u32>(&self) -> Trait { |                     ^^^^^ | = note: the only supported types are integers, `bool` and `char` error: aborting due to 14 previous errors; 5 warnings emitted </ins> <del> Some errors have detailed explanations: E0391, E0425. For more information about an error, try `rustc --explain E0391`. </del> <ins> Some errors have detailed explanations: E0038, E0391, E0403, E0423, E0425. For more information about an error, try `rustc --explain E0038`. </ins>