Description of problem:
when the application falls

Version-Release number of selected component:
gnome-gmail-1.9.4-1.fc23

Additional info:
reporter:       libreport-2.6.3
cmdline:        python /usr/share/gnome-gmail/gnomegmail.py
dso_list:       python-libs-2.7.10-8.fc23.x86_64
executable:     /usr/share/gnome-gmail/gnomegmail.py
kernel:         4.2.8-300.fc23.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
UserDict.py:23:__getitem__:KeyError: 'XDG_CURRENT_DESKTOP'

Traceback (most recent call last):
  File "/usr/share/gnome-gmail/gnomegmail.py", line 48, in <module>
    environ = os.environ['XDG_CURRENT_DESKTOP']
  File "/usr/lib64/python2.7/UserDict.py", line 23, in __getitem__
    raise KeyError(key)
KeyError: 'XDG_CURRENT_DESKTOP'

Local variables in innermost frame:
self: {'SSH_ASKPASS': '/usr/libexec/openssh/gnome-ssh-askpass', 'LESSOPEN': '|/usr/bin/lesspipe.sh %s', 'QT_IM_MODULE': 'xim', 'LOGNAME': 'mastaiza', 'USER': 'mastaiza', 'GNOME_KEYRING_CONTROL': '/home/mastaiza/.cache/keyring-YYMZ9X', 'XDG_VTNR': '1', 'PATH': '/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/mastaiza/.local/bin:/home/mastaiza/bin', 'DISPLAY': ':0', 'SSH_AGENT_PID': '1386', 'LANG': 'ru_RU.UTF-8', 'TERM': 'dumb', 'SHELL': '/bin/bash', 'XAUTHORITY': '/home/mastaiza/.Xauthority', 'SHLVL': '2', 'HISTSIZE': '1000', 'IMSETTINGS_INTEGRATE_DESKTOP': 'yes', 'HOME': '/home/mastaiza', 'IMSETTINGS_MODULE': 'none', 'XDG_RUNTIME_DIR': '/run/user/1000', 'SSH_AUTH_SOCK': '/tmp/ssh-LuDK61mnhdpE/agent.1264', 'XMODIFIERS': '@im=none', 'QT_GRAPHICSSYSTEM_CHECKED': '1', 'XDG_SESSION_ID': '1', 'DBUS_SESSION_BUS_ADDRESS': 'unix:abstract=/tmp/dbus-XsGi8uiyTK,guid=b9504efc852d77614d9a4d12567e84a2', '_': '/bin/python', 'GTK_IM_MODULE': 'gtk-im-context-simple', 'DESKTOP_SESSION': 'Icewm', 'HOSTNAME': 'masta-desktop', 'PREFERRED': '/usr/bin/startlxde', 'HISTCONTROL': 'ignoredups', 'PWD': '/home/mastaiza', 'MAIL': '/var/spool/mail/mastaiza', 'XDG_SEAT': 'seat0'}
key: 'XDG_CURRENT_DESKTOP'