key release event "leaked"

[cage]

Hi!

I do not  know if the behaviour is  a bug or not so I  am sending this
message here.

When  the screen  is split  (vertically or  horizontally, it  does not
matter), in my case  using 'C-p 3', the event "the  key for number '3'
has been pressed" is captured by the WM but the event that immediately
follows: "the key  for number '3' has been released",  is not captured
and "leaks" to  the widget that has the focus  in the application that
had the focus.

To  better  illustrate  this  behaviour  I  have  written  this  brief
function (TK interpreter (wish) is needed):

-----------✀-----------✀-----------✀-----------

(ql:quickload "nodgui")

(defun main ()
  (nodgui:with-nodgui ()
    (let ((entry  (make-instance 'nodgui:entry)))
      (nodgui:bind entry
                "<KeyRelease>"
                (lambda (e) (format t "keyrelease ~s~%" e)))
      (nodgui:bind entry
                "<KeyPress>"
                (lambda (e) (format t "keypress ~s~%" e)))
      (nodgui:grid entry  0 0)
      (nodgui:focus entry))))

-----------✀-----------✀-----------✀-----------

after loading this code and calling the function 'main' a simple
window with a text entry is shown, the entry get the focus.

Splitting the screen will fire the event "<KeyRelease>" (I do not know
the way this  event is called in  the X11 protocol, so I  am using the
TCL/TK term) and  the event is printed on  *standard-output*, you will
see that  the event has  a char slot  that has a  value of '3'  or '2'
depending of the splitting command.

I am not  sure that this could  be considered a bug, that  is, the key
release should  be swallowed by  stumpwm together with  the "keypress"
event, or it is  up to the GUI application to  deal with this spurious
"keyrelease" events.

Looking forward for your opinion!

Bye!
C.