LibJS: Convert IteratorValue AO to ThrowCompletionOr

Author: https://github.com/trflynn89
Commit: 7b4814f74c
Pull-request: https://github.com/SerenityOS/serenity/pull/10546
Reviewed-by: https://github.com/IdanHo
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Runtime/ArrayConstructor.cpp

@@ -134,9 +134,7 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(ArrayConstructor::from)
                 return array;
             }
 
-            auto next_value = iterator_value(global_object, *next);
-            if (vm.exception())
-                return {};
+            auto next_value = TRY_OR_DISCARD(iterator_value(global_object, *next));
 
             Value mapped_value;
             if (map_fn) {