🐛 only try to close stream (asyncio Protocol)

Author: Ousret

CHANGELOG.rst

@@ -8,6 +8,9 @@
 **Misc**
 - Support for PyPy 3.11
 
+**Fixed**
+- Asyncio Protocol may raise AssertionError upon closing if the FIN bit was already sent in a given stream.s
+
 1.4.1 (2025-02-05)
 ====================
 

qh3/asyncio/protocol.py

@@ -254,4 +254,7 @@ def close(self):
             return  # Defensive:
         if self.stream_id in self.protocol._quic._streams_finished:
             return  # Defensive:
-        self.protocol._quic.send_stream_data(self.stream_id, b"", True)
+        try:
+            self.protocol._quic.send_stream_data(self.stream_id, b"", True)
+        except AssertionError:
+            pass  # Defensive: avoid duplicate call (FIN bit may already be set!)