Fix regression for private in public

Author: GuillaumeGomez

src/librustdoc/clean/mod.rs

@@ -1584,6 +1584,7 @@ fn first_non_private<'tcx>(
                 if let Some(use_def_id) = reexp.id() &&
                     let Some(local_use_def_id) = use_def_id.as_local() &&
                     let Some(hir::Node::Item(item)) = hir.find_by_def_id(local_use_def_id) &&
+                    !item.ident.name.is_empty() &&
                     let hir::ItemKind::Use(path, _) = item.kind
                 {
                     for res in &path.res {

tests/rustdoc/auxiliary/jump-to-def-res-err-handling-aux.rs

@@ -0,0 +1 @@
+pub struct Ident;

tests/rustdoc/private-use.rs

@@ -0,0 +1,13 @@
+// Regression test for <https://github.com/rust-lang/rust/pull/113374> to
+// ensure it doesn't panic.
+
+mod generics {
+    pub enum WherePredicate {
+        EqPredicate,
+    }
+}
+pub mod visit {
+    use *;
+    pub fn visit_where_predicate<V>(_visitor: &mut V, _i: &WherePredicate) {}
+}
+pub use generics::*;