Version-Release number of selected component:
gnome-calendar-3.18.1-1.fc23

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/bin/gnome-calendar --gapplication-service
crash_function: g_malloc0
executable:     /usr/bin/gnome-calendar
global_pid:     3116
kernel:         4.2.8-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #7 g_malloc0 at gmem.c:124
 #8 _gtk_css_lookup_new at gtkcsslookup.c:33
 #9 gtk_css_static_style_new_compute at gtkcssstaticstyle.c:179
 #10 gtk_css_node_create_style at gtkcssnode.c:330
 #11 gtk_css_node_real_update_style at gtkcssnode.c:384
 #12 gtk_css_node_ensure_style at gtkcssnode.c:923
 #14 gtk_css_node_get_style at gtkcssnode.c:949
 #15 gtk_style_context_get_property at gtkstylecontext.c:841
 #16 gtk_style_context_get_valist at gtkstylecontext.c:871
 #17 gtk_style_context_get at gtkstylecontext.c:911