BuiltinDataReader should keep a listener reference like a normal DataReader

willstott101 · willstott101 · commit 089780dbe1bf · 2022-08-18T19:21:24.000+01:00
diff --git a/cyclonedds/builtin.py b/cyclonedds/builtin.py
@@ -154,7 +154,8 @@ def __init__(self,
                 builtin_topic._ref,
                 cqos,
                 listener._ref if listener else None
-            )
+            ),
+            listener=listener
         )
         self._next_condition = ReadCondition(self, ViewState.Any | SampleState.NotRead | InstanceState.Any)
         if cqos:
