fix crash on startup

lib/controllers/client.dart

@@ -57,12 +57,15 @@ class ClientController extends AsyncNotifier<int> {
       for (final MapEntry(:key, :value) in env.entries) {
         final keyPtr = key.toNativeUtf8().cast<Char>();
         final valuePtr = value.toNativeUtf8().cast<Char>();
+        try {
           GomuksSetEnv(keyPtr, valuePtr);
+        } finally {
           calloc
             ..free(keyPtr)
             ..free(valuePtr);
         }
       }
+    }
 
     debugPrint("Initializing Gomuks...");
     final handle = await Isolate.run(() {
@@ -107,8 +110,9 @@ class ClientController extends AsyncNotifier<int> {
 
       return json;
     } finally {
-      calloc.free(bufferPointer.ref.base);
-      calloc.free(bufferPointer);
+      calloc
+        ..free(bufferPointer.ref.base)
+        ..free(bufferPointer);
     }
   }
 

lib/helpers/hooks/chat_scroll.dart

@@ -71,7 +71,7 @@ final class ChatScroll<T>({
         if (position.extentAfter <= topThreshold) {
           await loadOlder();
         } else if (position.extentBefore <= bottomThreshold) {
-          onReachedBottom();
+          await onReachedBottom();
         }
       }