is_default_equivalent_ctor: store name in a var

Author: ada4a

clippy_utils/src/lib.rs

@@ -641,9 +641,7 @@ fn is_default_equivalent_ctor(cx: &LateContext<'_>, def_id: DefId, path: &QPath<
         && let Some(adt) = cx.tcx.type_of(impl_did).instantiate_identity().ty_adt_def()
     {
         return Some(adt.did()) == cx.tcx.lang_items().string()
-            || std_types_symbols
-                .iter()
-                .any(|&symbol| cx.tcx.is_diagnostic_item(symbol, adt.did()));
+            || (cx.tcx.get_diagnostic_name(adt.did())).is_some_and(|adt_name| std_types_symbols.contains(&adt_name));
     }
     false
 }