#0  0x00007ffff3f388d5 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ffff3f3c370 in *__GI_abort () at abort.c:92
#2  0x00007ffff470b980 in IA__g_assertion_message (domain=<value optimized out>, file=<value optimized out>, line=<value optimized out>, func=0x455e30 "get_folders_treeview", 
    message=0x8ee7c0 "assertion failed: (GTK_IS_TREE_VIEW( treeview ))") at /build/buildd/glib2.0-2.23.1/glib/gtestutils.c:1317
#3  0x00007ffff470bef0 in IA__g_assertion_message_expr (domain=0x44ec24 "NA-nact", file=0x455b90 "nact-ibackground-tab.c", line=381, func=0x455e30 "get_folders_treeview", expr=<value optimized out>)
    at /build/buildd/glib2.0-2.23.1/glib/gtestutils.c:1328
#4  0x0000000000425c01 in ?? ()
#5  0x0000000000426888 in nact_ibackground_tab_initial_load_toplevel ()
#6  0x000000000042de04 in ?? ()
#7  0x00007ffff4b8393e in IA__g_closure_invoke (closure=0x715b40, return_value=0x0, n_param_values=2, param_values=0x86ef90, invocation_hint=0x7fffffffe360)
    at /build/buildd/glib2.0-2.23.1/gobject/gclosure.c:767
#8  0x00007ffff4b99bf6 in signal_emit_unlocked_R (node=0x846a90, detail=<value optimized out>, instance=<value optimized out>, emission_return=<value optimized out>, 
    instance_and_params=<value optimized out>) at /build/buildd/glib2.0-2.23.1/gobject/gsignal.c:3247
#9  0x00007ffff4b9b039 in IA__g_signal_emit_valist (instance=0x882a90, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffe560) at /build/buildd/glib2.0-2.23.1/gobject/gsignal.c:2980
#10 0x00007ffff4b9b3f4 in IA__g_signal_emit_by_name (instance=0x882a90, detailed_signal=0x44faae "nact-base-window-initial-load") at /build/buildd/glib2.0-2.23.1/gobject/gsignal.c:3074
#11 0x0000000000416206 in base_window_init ()
#12 0x00000000004124dd in ?? ()
#13 0x0000000000429452 in main ()