fix(web): swallow non-UpdateNotification BroadcastUpdates payloads

packages/sqlite_async/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 0.14.2-wip
+
+- Web: fix uncaught error from `BroadcastUpdates` when a peer publishes a
+  message that does not deserialise into an `UpdateNotification`. The bare
+  `.cast()` after `.where()` is now typed explicitly, and a defensive
+  `onError` handler is attached to the broadcast subscription so malformed
+  peer payloads degrade silently instead of crashing the host application.
+
 ## 0.14.1
 
 - Fix update notifications sometimes firing before a write has completed.

packages/sqlite_async/lib/src/web/database/async_web_database.dart

@@ -70,6 +70,12 @@ final class AsyncWebDatabaseImpl extends SqliteDatabaseImpl
       _broadcastUpdatesSubscription =
           broadcastUpdates.updates.listen((updates) {
         updatesController.add(updates);
+      }, onError: (Object error, StackTrace stackTrace) {
+        // Cross-tab BroadcastChannel may deliver payloads that do not
+        // deserialise into an UpdateNotification (legacy storage mode,
+        // malformed peer messages, SharedWorker fallback). Drop them
+        // rather than crashing the host application via an uncaught
+        // error on the root zone.
       });
     }
   }

packages/sqlite_async/lib/src/web/database/broadcast_updates.dart

@@ -25,7 +25,7 @@ class BroadcastUpdates {
           }
         })
         .where((e) => e != null)
-        .cast();
+        .cast<UpdateNotification>();
   }
 
   void send(UpdateNotification notification) {

packages/sqlite_async/pubspec.yaml

@@ -1,6 +1,6 @@
 name: sqlite_async
 description: High-performance asynchronous interface for SQLite on Dart and Flutter.
-version: 0.14.1
+version: 0.14.2-wip
 resolution: workspace
 repository: https://github.com/powersync-ja/sqlite_async.dart
 environment: