Description of problem:
1. Open it 
/usr/bin/mate-power-statistics --device /org/freedesktop/UPower/devices/battery_BAT0
2. Click on LaptopBatter on the left panel
3. Click on Statistic tab on the right panel
4. Cick  on AC adapter on the left panel
5. carsh
Segmentation fault (core dumped)

Version-Release number of selected component:
mate-power-manager-1.8.1-2.fc21

Additional info:
reporter:       libreport-2.3.0
backtrace_rating: 4
cmdline:        /usr/bin/mate-power-statistics --device /org/freedesktop/UPower/devices/battery_BAT0
crash_function: g_variant_unref
executable:     /usr/bin/mate-power-statistics
kernel:         3.18.3-201.fc21.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_variant_unref at gvariant-core.c:625
 #1 up_device_get_statistics_sync at up-device.c:560
 #2 gpm_stats_update_info_page_stats at gpm-statistics.c:708
 #3 gpm_stats_update_info_data_page at gpm-statistics.c:759
 #4 gpm_stats_update_info_data at gpm-statistics.c:806
 #5 gpm_stats_notebook_changed_cb at gpm-statistics.c:1121
 #15 g_object_notify_by_spec_internal at gobject.c:1149
 #16 g_object_notify at gobject.c:1197
 #17 gtk_widget_hide at gtkwidget.c:3330
 #18 gpm_stats_update_info_data at gpm-statistics.c:799