Version-Release number of selected component:
gnome-software-3.10.0-1.fc20

Additional info:
reporter:       libreport-2.1.7
backtrace_rating: 4
cmdline:        gnome-software
crash_function: type_check_is_value_type_U
executable:     /usr/bin/gnome-software
kernel:         3.11.1-300.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 type_check_is_value_type_U at gtype.c:4107
 #1 g_type_check_value at gtype.c:4149
 #2 g_param_value_set_default at gparam.c:608
 #3 _gtk_style_context_peek_style_property at gtkstylecontext.c:2388
 #4 gtk_style_context_get_style_valist at gtkstylecontext.c:2536
 #5 gtk_style_context_get_style at gtkstylecontext.c:2574
 #6 gtk_button_construct_child at gtkbutton.c:1173
 #7 gtk_button_set_label at gtkbutton.c:2328
 #8 gs_shell_details_refresh at gs-shell-details.c:99
 #13 gs_plugin_loader_thread_func at gs-plugin-loader.c:1616