Version-Release number of selected component:
firewall-config-0.3.12-1.fc20

Additional info:
reporter:       libreport-2.2.3
cmdline:        /usr/bin/python -Es /usr/bin/firewall-config
executable:     /usr/bin/firewall-config
kernel:         3.17.4-200.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
firewall-config:2053:onChangeZone:TypeError: Argument 1 does not allow None as a value

Traceback (most recent call last):
  File "/usr/bin/firewall-config", line 2053, in onChangeZone
    self.masqueradeCheck.set_active(masquerade)
TypeError: Argument 1 does not allow None as a value

Local variables in innermost frame:
masquerade: None
name: 'xmpp-server'
_services: []
sources: []
default: False
interfaces: ['p20p1']
args: (<TreeSelection object at 0x1806e60 (GtkTreeSelection at 0x1aab570)>,)
iter: None
self: <__main__.FirewallConfig object at 0x17a6850>
item: ['22000', 'tcp']
builtin: False
icmpblocks: []
rules: []
services: ['dhcpv6-client', 'ipp', 'ipp-client', 'ipsec', 'mdns', 'openvpn', 'ssh']
selected_zone: 'public'
ports: [['22000', 'udp'], ['22000', 'tcp']]
forward_ports: []