From 0d6ff75bd04c9fe813d6e32521f0b8e47a89ca9d Mon Sep 17 00:00:00 2001
From: Michael Wilkerson-Barker <michael.wilkersonbarker@mongodb.com>
Date: Wed, 20 Dec 2023 01:39:25 -0500
Subject: [PATCH] Fixed core mapping

---
 lib/src/native/realm_core.dart | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/lib/src/native/realm_core.dart b/lib/src/native/realm_core.dart
index a38875de4..e321c06c9 100644
--- a/lib/src/native/realm_core.dart
+++ b/lib/src/native/realm_core.dart
@@ -2347,17 +2347,16 @@ class _RealmCore {
 
   Future<void> updateBaseUrl(App app, Uri baseUrl) {
     final completer = Completer<void>();
-    String url = baseUrl.toString();
     using((arena) {
-    _realmLib.invokeGetBool(
-        () => _realmLib.realm_app_update_base_url(
-              app.handle._pointer,
-              url.toCharPtr(arena),
-              Pointer.fromFunction(void_completion_callback),
-              completer.toPersistentHandle(),
-              _realmLib.addresses.realm_dart_delete_persistent_handle,
-            ),
-        "Update base URL failed");
+      _realmLib.invokeGetBool(
+          () => _realmLib.realm_app_update_base_url(
+                app.handle._pointer,
+                baseUrl.toString().toCharPtr(arena),
+                _realmLib.addresses.realm_dart_void_completion_callback,
+                _createAsyncCallbackUserdata(completer),
+                _realmLib.addresses.realm_dart_userdata_async_free,
+              ),
+          "Update base URL failed");
     });
     return completer.future;
   }