IndexError on aliases with no parameters

[egegunes]

Config:

[alias]
s = list statuses

Command: redmine s

Error:

Traceback (most recent call last):
  File "/home/egegunes/Dev/redmine-cli/venv/bin/redmine", line 11, in <module>
    load_entry_point('redmine-cli', 'console_scripts', 'redmine')()
  File "/home/egegunes/Dev/redmine-cli/venv/lib64/python3.6/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/home/egegunes/Dev/redmine-cli/venv/lib64/python3.6/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/egegunes/Dev/redmine-cli/venv/lib64/python3.6/site-packages/click/core.py", line 1132, in invoke
    cmd_name, cmd, args = self.resolve_command(ctx, args)
  File "/home/egegunes/Dev/redmine-cli/venv/lib64/python3.6/site-packages/click/core.py", line 1171, in resolve_command
    cmd = self.get_command(ctx, cmd_name)
  File "/home/egegunes/Dev/redmine-cli/redmine/cli/alias.py", line 26, in get_command
    params = self.group_params(actual_cmd[1:])
  File "/home/egegunes/Dev/redmine-cli/redmine/cli/alias.py", line 11, in group_params
    grouped_params.append((params[i].lstrip("-"), params[i + 1]))
IndexError: list index out of range