.
Thread 3 (process 1504):
#0  0x001bc416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x005a5e96 in *__GI___poll (fds=0x96820c0, nfds=3, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:87
	resultvar = <value optimized out>
	oldtype = -516
	result = <value optimized out>
#2  0xffffffff in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 2 (process 1507):
#0  0x001bc416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x005a5e96 in *__GI___poll (fds=0x9689bd0, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:87
	resultvar = <value optimized out>
	oldtype = -516
	result = <value optimized out>
#2  0xffffffff in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 1 (process 1471):
#0  0x00365f57 in g_variant_is_trusted (value=0x0)
    at /build/buildd/glib2.0-2.28.0/glib/gvariant-core.c:363
No locals.
#1  0x00363810 in g_variant_builder_add_value (builder=0xbfb40f00, value=0x0)
    at /build/buildd/glib2.0-2.28.0/glib/gvariant.c:684
	__PRETTY_FUNCTION__ = "g_variant_builder_add_value"
#2  0x00000000 in ?? ()
No symbol table info available.