error[E0403]: the name `N` is already used for a generic parameter in this item's generic parameters
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:4:18
   |
LL | trait Trait<const N: dyn Trait = bar> {
   |                   - first use of `N`
...
LL |     fn fnc<const N: dyn Trait = u32>(&self) -> dyn Trait {
   |                  ^ already used

error[E0425]: cannot find value `bar` in this scope
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:34
   |
LL | trait Trait<const N: dyn Trait = bar> {
   |                                  ^^^ not found in this scope

error[E0423]: expected value, found builtin type `u32`
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:4:33
   |
LL |     fn fnc<const N: dyn Trait = u32>(&self) -> dyn Trait {
   |                                 ^^^ not a value

error[E0425]: cannot find value `bar` in this scope
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:8:9
   |
LL |         bar
   |         ^^^ not found in this scope

error[E0391]: cycle detected when computing type of `Trait::N`
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:26
   |
LL | trait Trait<const N: dyn Trait = bar> {
   |                          ^^^^^
   |
   = note: ...which immediately requires computing type of `Trait::N` again
note: cycle used when checking that `Trait` is well-formed
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:1
   |
LL | trait Trait<const N: dyn Trait = bar> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

error: defaults for const parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
  --> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:4:12
   |
LL |     fn fnc<const N: dyn Trait = u32>(&self) -> dyn Trait {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 6 previous errors

Some errors have detailed explanations: E0391, E0403, E0423, E0425.
For more information about an error, try `rustc --explain E0391`.