TRACE log when we receive and buffer a non-complete line

src/IRCServer.py

@@ -224,7 +224,10 @@ class Server(IRCObject.Object):
 
         data_lines = [line.strip(b"\r") for line in data.split(b"\n")]
         if data_lines[-1]:
+            self.bot.log.trace("got non-complete line '%s', buffering.",
+                [data_lines[-1]])
             self.read_buffer = data_lines[-1]
+
         data_lines.pop(-1)
         decoded_lines = []