Comment 4 for bug 1845933

When i run these commands i get following error:

juju-crashdump -a debug-layer -a config
Traceback (most recent call last):
  File "/snap/juju-crashdump/137/bin/juju-crashdump", line 11, in <module>
    load_entry_point('jujucrashdump==0.0.0', 'console_scripts', 'juju-crashdump')()
  File "/snap/juju-crashdump/137/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 542, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/snap/juju-crashdump/137/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2569, in load_entry_point
    return ep.load()
  File "/snap/juju-crashdump/137/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2229, in load
    return self.resolve()
  File "/snap/juju-crashdump/137/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2235, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/snap/juju-crashdump/137/lib/python2.7/site-packages/jujucrashdump/crashdump.py", line 16, in <module>
    import concurrent.futures
ImportError: No module named concurrent.futures