wstool init fails

edit

I am trying to build catkin workspace following instructions.

mkdir -p  ~/overlay_ws
cd ~/overlay_ws
mkdir -p src
cd src
wstool init

But it is failing with:

ubuntu:~/overlay_ws/src$ wstool init
Traceback (most recent call last):
  File "/usr/bin/wstool", line 63, in <module>
    sys.exit(wstool.wstool_cli.wstool_main(sys.argv))
  File "/usr/lib/pymodules/python2.7/wstool/wstool_cli.py", line 217, in wstool_main
    'info': cli.cmd_info,
AttributeError: WstoolCLI instance has no attribute 'cmd_info'