Fix impl trait in anon const resolution

Author: oli-obk

compiler/rustc_middle/src/hir/map/mod.rs

@@ -697,6 +697,7 @@ impl<'hir> Map<'hir> {
             | Node::ForeignItem(ForeignItem { kind: ForeignItemKind::Fn(..), .. })
             | Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(..), .. })
             | Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(..), .. })
+            | Node::AnonConst(..)
             | Node::Block(_) = node
             {
                 return Some(hir_id);

src/test/ui/impl-trait/issues/issue-78722.rs

@@ -5,6 +5,7 @@
 //~^ WARN the feature `impl_trait_in_bindings` is incomplete
 
 type F = impl core::future::Future<Output = u8>;
+//~^ ERROR type mismatch
 
 struct Bug {
     V1: [(); {

src/test/ui/impl-trait/issues/issue-78722.stderr

@@ -14,13 +14,13 @@ LL | type F = impl core::future::Future<Output = u8>;
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `u8`
 
 error: `async` blocks are not allowed in constants
-  --> $DIR/issue-78722.rs:14:20
+  --> $DIR/issue-78722.rs:15:20
    |
 LL |         let f: F = async { 1 };
    |                    ^^^^^^^^^^^
 
 error[E0493]: destructors cannot be evaluated at compile-time
-  --> $DIR/issue-78722.rs:14:13
+  --> $DIR/issue-78722.rs:15:13
    |
 LL |         let f: F = async { 1 };
    |             ^ constants cannot evaluate destructors