Whenever I try to write something to a window that
would cause text to appear in the lower right corner
I get an error
w = curses.newwin(2,10,0,0)
w.addstr(1,9,"X")   ->   
      _curses.error: addstr() returned ERR


w.addch(1,9,ord("x")) ->
      _curses.error: addch() returned ERR

Same behaviour on all versions I tried.
1.5.2
2.1
2.0


ncurses-5.2 if that is of importance.