LibJS: Do not store iterated values in a plain vector

Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/108b4e7c15f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2088

Userland/Libraries/LibJS/Runtime/IteratorPrototype.cpp

@@ -717,7 +717,7 @@ JS_DEFINE_NATIVE_FUNCTION(IteratorPrototype::to_array)
     auto iterated = TRY(get_iterator_direct(vm, object));
 
     // 4. Let items be a new empty List.
-    Vector<Value> items;
+    MarkedVector<Value> items(realm.heap());
 
     // 5. Repeat,
     while (true) {
@@ -729,7 +729,7 @@ JS_DEFINE_NATIVE_FUNCTION(IteratorPrototype::to_array)
             return Array::create_from(realm, items);
 
         // c. Append value to items.
-        TRY_OR_THROW_OOM(vm, items.try_append(*value));
+        items.append(*value);
     }
 }