.
Thread 3 (Thread 2951):
#0  0x00007fce40adc0c3 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007fce40decd68 in g_main_dispatch (context=0xffffffff) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:2424
        _g_boolean_var_ = 1
        source = <error reading variable source (Cannot access memory at address 0xfffffffffffffdfc)>
        current = 0x7fce41095f40
        i = 29589152
#2  g_main_context_dispatch (context=0xffffffff) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3046
No locals.
#3  0x00007fce40af8690 in ?? () at forward.c:184 from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#4  0x00007fce41095820 in ?? ()
No symbol table info available.
#5  0x00007fce41095808 in ?? ()
No symbol table info available.
#6  0x00007fce40af8660 in ?? () at forward.c:182 from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x00007fce2fcd2a0b in dconf_context_thread (data=<value optimized out>) at dconfcontext.c:11
        context = 0x7fce41095f40
        loop = <value optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#8  0x00007fce40e12256 in g_once_init_enter_impl (value_location=0x0) at /build/buildd/glib2.0-2.29.10/./glib/gthread.c:1116
        need_init = 0
#9  0x00007fce2fccd9c0 in ?? ()
No symbol table info available.
#10 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 2950):
#0  0x00007fce40adc0c3 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007fce40decd68 in g_main_dispatch (context=0xffffffff) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:2424
        _g_boolean_var_ = 1
        source = <error reading variable source (Cannot access memory at address 0xfffffffffffffdfc)>
        current = 0x7fce41095f40
        i = 29578752
#2  g_main_context_dispatch (context=0xffffffff) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3046
No locals.
#3  0x00007fce40af8690 in ?? () at forward.c:184 from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#4  0x00007fce41095820 in ?? ()
No symbol table info available.
#5  0x00007fce41095808 in ?? ()
No symbol table info available.
#6  0x00007fce40af8660 in ?? () at forward.c:182 from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x00007fce41d416f6 in g_dbus_proxy_call_finish (proxy=0x3, res=0x1, error=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./gio/gdbusproxy.c:2568
        simple = <value optimized out>
        __PRETTY_FUNCTION__ = "g_dbus_proxy_call_finish"
#8  0x00007fce30cf69c0 in ?? ()
No symbol table info available.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 2943):
#0  0x00007fce4182a9d4 in value_param_lcopy_value (value=0x1afc4d0, n_collect_values=1115668936, collect_values=0x1b2d980, collect_flags=1) at /build/buildd/glib2.0-2.29.10/./gobject/gparam.c:832
        param_p = 0x1afc4d0
Cannot access memory at address 0x7fff6480dfc0