$ emacs --version
GNU Emacs 26.0.50
Copyright (C) 2017 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GNU Emacs
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.
installed twittering-mode version is 20170312.735 from melpa.
twttering-icon-mode occur error 23 because curl does not spew binary without --output option since this commit: https://github.com/curl/curl/commit/5385450afd61328e7d24b50eeffc2b1571cd9e2f.
some informations below:
installed twittering-mode version is
20170312.735
from melpa.