Update #83739 with type of the item specified

Author: fee1-dead

compiler/rustc_typeck/src/collect.rs

@@ -839,7 +839,15 @@ fn convert_item(tcx: TyCtxt<'_>, item_id: hir::ItemId) {
                     if let hir::TyKind::TraitObject(..) = ty.kind {
                         let mut visitor = PlaceholderHirTyCollector::default();
                         visitor.visit_item(it);
-                        placeholder_type_error(tcx, None, &[], visitor.0, false, None);
+                        placeholder_type_error(
+                            tcx,
+                            None,
+                            &[],
+                            visitor.0,
+                            false,
+                            None,
+                            it.kind.descr(),
+                        );
                     }
                 }
                 _ => (),

src/test/ui/typeck/issue-75889.stderr

@@ -1,10 +1,10 @@
-error[E0121]: the type placeholder `_` is not allowed within types on item signatures
+error[E0121]: the type placeholder `_` is not allowed within types on item signatures for constant items
   --> $DIR/issue-75889.rs:3:24
    |
 LL | const FOO: dyn Fn() -> _ = "";
    |                        ^ not allowed in type signatures
 
-error[E0121]: the type placeholder `_` is not allowed within types on item signatures
+error[E0121]: the type placeholder `_` is not allowed within types on item signatures for static items
   --> $DIR/issue-75889.rs:4:25
    |
 LL | static BOO: dyn Fn() -> _ = "";