#0  0x00007fcb7baf74d2 in g_variant_is_trusted (value=0x0) at /build/buildd/glib2.0-2.31.12/./glib/gvariant-core.c:604
No locals.
#1  0x00007fcb7baf4876 in g_variant_builder_add_value (builder=0x7fff20999b10, value=0x0) at /build/buildd/glib2.0-2.31.12/./glib/gvariant.c:3393
        __PRETTY_FUNCTION__ = "g_variant_builder_add_value"
#2  0x0000000000401640 in ?? ()
No symbol table info available.
#3  0x0000000000401888 in ?? ()
No symbol table info available.
#4  0x0000000000401434 in ?? ()
No symbol table info available.
#5  0x00007fcb7b09730d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#6  0x000000000040151d in ?? ()
No symbol table info available.
#7  0x00007fff20999da8 in ?? ()
No symbol table info available.
#8  0x000000000000001c in ?? ()
No symbol table info available.
#9  0x0000000000000001 in ?? ()
No symbol table info available.
#10 0x00007fff2099b547 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.