Jupyter qtconsole starts with cell number 2

[kojix2]

Jupyter qtconsole starts with cell number 2. Why?

[kojix2]

Now I understand why.

Jupyter Qt Console sends an execute_request after receiving kernel_info_reply.
And IRuby receives it.

Then IRuby executes empty cell and sends an execute_reply.
The execution count is incremented.

Other Jupyter frontends, such as Notebook, Lab, Console, do not send execute_request.
So execution count is not incremented

There are two possibilities.

1.IRuby's reply to kernel_info_request or history_request is flawed. So QtConsole sends execute_request.
2.QtConsole always sends an execute_request at the beginning.

I found every Jupyter frontend sends kernel_info_request twice. This may indicate that there is something wrong with IRuby's kernel_info_reply.