.
Thread 1 (Thread 4105):
#0  0x00007ff2548f1d05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <value optimized out>
        selftid = 4105
#1  0x00007ff2548f5ab6 in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x1a0e430, sa_sigaction = 0x1a0e430}, sa_mask = {__val = {140678781067712, 2, 27206752, 140678777293728, 140678807629824, 21, 140678777776355, 4294967295, 27206752, 27321392, 2, 3068024, 0, 0, 140678791114400, 140678788042752}}, sa_flags = 1446808868, sa_restorer = 0x1}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007ff255350a22 in g_logv (log_domain=0x404219 "GduNotification", log_level=<value optimized out>, format=0x4041ba "%s", args1=0x7fff9be7e400) at /build/buildd/glib2.0-2.28.5/./glib/gmessages.c:557
        depth = <value optimized out>
        domain = 0x0
        data = 0x0
        log_func = 0x7ff25534fba0 <g_log_default_handler>
        domain_fatal_mask = <value optimized out>
        masquerade_fatal = <value optimized out>
        test_level = <value optimized out>
        was_fatal = 0
        was_recursion = 0
        i = 2
#3  0x00007ff255350aaf in g_log (log_domain=<value optimized out>, log_level=<value optimized out>, format=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmessages.c:577
        args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff9be7e4e0, reg_save_area = 0x7fff9be7e420}}
#4  0x00000000004032b1 in main (argc=1, argv=0x7fff9be7e6c8) at notification-main.c:528
        error = 0x19f06a0
        opt_entries = {{long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}