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Expected Behavior

Sending the command x-set-fingerprint: should return a proper error message if user forgets to send the argument.

Actual Behavior

an unknown error is send back and roots of schleuder server are notified

Steps to Reproduce the Problem

Send this to -request address:

x-list-name: test-list@cryptolists.mail36.net
x-set-fingerprint:

Specifications

• Version: 3.2.2-1~bpo9+1
• Installation method: deb-package on from Stretch backports
• Mail client version: n.a.

Other information

Running keyword 'set-fingerprint' caused an unknown error. System-admins have been notified.

From: schleuder@hostname
To: root@localhost
Subject: Error

undefined method `match' for nil:NilClass
Did you mean?  catch
/usr/lib/ruby/vendor_ruby/schleuder/plugins/subscription_management.rb:101:in `set_fingerprint'
/usr/lib/ruby/vendor_ruby/schleuder/plugin_runners/base.rb:47:in `run_command'
/usr/lib/ruby/vendor_ruby/schleuder/plugin_runners/base.rb:33:in `run_plugin'
/usr/lib/ruby/vendor_ruby/schleuder/plugin_runners/base.rb:11:in `block in run'
/usr/lib/ruby/vendor_ruby/schleuder/plugin_runners/base.rb:10:in `map'
/usr/lib/ruby/vendor_ruby/schleuder/plugin_runners/base.rb:10:in `run'

plugins/subscription_management.rb:101

def self.set_fingerprint(arguments, list, mail)
  if arguments.first.match(/@/)
    if arguments.first == mail.signer.email || list.from_admin?(mail)
      email = arguments.shift
    else
...