Program received signal SIGSEGV, Segmentation fault.
0x00000000004306c5 in __lambda54_ (_data8_=0x7fffd8039810) at /home/lasse/checkout/gnome/gnome-boxes/src/app.vala:511
511	            foreach (var item in items) {
(gdb) backtrace
#0  0x00000000004306c5 in __lambda54_ (_data8_=0x7fffd8039810) at /home/lasse/checkout/gnome/gnome-boxes/src/app.vala:511
#1  0x0000000000430894 in ___lambda54__boxes_notification_cancel_func (self=0x7fffd8039810)
    at /home/lasse/checkout/gnome/gnome-boxes/src/app.vala:509
#2  0x000000000048085b in __lambda21_ (_data40_=0x8d5800) at /home/lasse/checkout/gnome/gnome-boxes/src/notification.vala:29
#3  0x0000000000480879 in ___lambda21__gd_notification_dismissed (_sender=0xd18790, self=0x8d5800)
    at /home/lasse/checkout/gnome/gnome-boxes/src/notification.vala:27
#4  0x00007ffff3a81f08 in g_closure_invoke (closure=0x116a850, return_value=0x0, n_param_values=1, param_values=0x7fffffffcfd0,
    invocation_hint=0x7fffffffcf70) at gclosure.c:768
#5  0x00007ffff3a9426d in signal_emit_unlocked_R (node=node@entry=0x11504d0, detail=detail@entry=0,
    instance=instance@entry=0xd18790, emission_return=emission_return@entry=0x0,
    instance_and_params=instance_and_params@entry=0x7fffffffcfd0) at gsignal.c:3551
#6  0x00007ffff3a9c232 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>,
    var_args=var_args@entry=0x7fffffffd148) at gsignal.c:3307
#7  0x00007ffff3a9c472 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>)
    at gsignal.c:3363
#8  0x00000000004ea8c6 in gd_notification_destroy (widget=0xd18790) at libgd/gd-notification.c:172
#9  0x00007ffff3a81f08 in g_closure_invoke (closure=0x83cd80, return_value=0x0, n_param_values=1, param_values=0x7fffffffd3e0,
    invocation_hint=0x7fffffffd380) at gclosure.c:768
#10 0x00007ffff3a94604 in signal_emit_unlocked_R (node=node@entry=0x836910, detail=detail@entry=0,
    instance=instance@entry=0xd18790, emission_return=emission_return@entry=0x0,
    instance_and_params=instance_and_params@entry=0x7fffffffd3e0) at gsignal.c:3667
#11 0x00007ffff3a9c232 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>,
    var_args=var_args@entry=0x7fffffffd558) at gsignal.c:3307
#12 0x00007ffff3a9c472 in g_signal_emit (instance=instance@entry=0xd18790, signal_id=<optimized out>, detail=detail@entry=0)
    at gsignal.c:3363
#13 0x00007ffff51cef58 in gtk_widget_dispose (object=0xd18790) at gtkwidget.c:11348
#14 0x00007ffff3a88810 in g_object_run_dispose (object=0xd18790) at gobject.c:1073
#15 0x00000000004ead56 in animation_timeout_cb (user_data=0xd18790) at libgd/gd-notification.c:290
#16 0x00007ffff4c1ac08 in gdk_threads_dispatch (data=0x116a2e0, data@entry=<error reading variable: value has been optimized out>)
    at gdk.c:635
#17 0x00007ffff378a0c3 in g_timeout_dispatch (source=0x116db70, callback=<optimized out>, user_data=<optimized out>)
    at gmain.c:4472
#18 0x00007ffff37896a5 in g_main_dispatch (context=0x85ba10) at gmain.c:3064
#19 g_main_context_dispatch (context=context@entry=0x85ba10) at gmain.c:3663
#20 0x00007ffff3789a08 in g_main_context_iterate (context=context@entry=0x85ba10, block=block@entry=1, dispatch=dispatch@entry=1,
    self=<optimized out>) at gmain.c:3734
#21 0x00007ffff3789aac in g_main_context_iteration (context=0x85ba10, context@entry=0x0, may_block=may_block@entry=1)
    at gmain.c:3795
#22 0x00007ffff3d6b3ec in g_application_run (application=0x833100, argc=1, argv=0x7fffffffd9e8) at gapplication.c:2114
#23 0x0000000000478500 in _vala_main (args=0x7fffffffd9e8, args_length1=1)
    at /home/lasse/checkout/gnome/gnome-boxes/src/main.vala:84
#24 0x0000000000478554 in main (argc=1, argv=0x7fffffffd9e8) at /home/lasse/checkout/gnome/gnome-boxes/src/main.vala:68