Another approach to typecasting fix for jython. For some reason += throws TypeError, but .extend triggers implicit typecasting.

devendor · devendor · commit 9d4909a987be · 2018-10-01T15:52:25.000Z
diff --git a/msgpack/fallback.py b/msgpack/fallback.py
@@ -297,7 +297,7 @@ def feed(self, next_bytes):
             self._buff_i -= self._buf_checkpoint
             self._buf_checkpoint = 0
 
-        self._buffer += bytearray(view)
+        self._buffer.extend(view)
 
     def _consume(self):
         """ Gets rid of the used parts of the buffer. """
