(gdb) bt full
#0  0x00000036bd636315 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = 26445
        selftid = 26445
#1  0x00000036bd637c2b in __GI_abort () at abort.c:93
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0}, sa_mask = {__val = {235135174498, 235105446912, 140566300812496, 2048, 4294967296, 49034816, 49034816, 4294967295, 50418176, 50401136, 
    50401136, 235138052152, 0, 0, 235147430944, 0}}, sa_flags = -1121918620, sa_restorer = 0x3600000005}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00000036bf2685ad in g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x7fd824724720 "gee_hash_map_node_iterator_next", message=
    0x300f480 "assertion failed: (self->_stamp == self->_map->priv->_stamp)") at gtestutils.c:1425
        lstr = "2322\000\177\000\000\240\a\252\215\377\177\000\000p\347\000\003\000\000\000\000\220Ar$\330\177\000"
        s = 0x3010f70 "ERROR:hashmap.c:2322:gee_hash_map_node_iterator_next: assertion failed: (self->_stamp == self->_map->priv->_stamp)"
#3  0x00000036bf268ad2 in g_assertion_message_expr (domain=0x0, file=0x7fd824723f6c "hashmap.c", line=2322, func=0x7fd824724720 "gee_hash_map_node_iterator_next", expr=<optimized out>) at gtestutils.c:1436
        s = <optimized out>
#4  0x00007fd8246ff44a in gee_hash_map_node_iterator_next (self=<optimized out>) at hashmap.c:2322
No locals.
#5  gee_hash_map_node_iterator_next (self=0x13776e0 [GeeHashMapValueIterator]) at hashmap.c:2318
        result = 0
        _tmp0_ = <optimized out>
#6  0x00007fd82496677c in _folks_individual_aggregator_add_backend_co (_data_=0x300b2d0) at individual-aggregator.c:2204
No locals.
#7  _folks_individual_aggregator_add_backend (self=0x24f42d0 [FolksIndividualAggregator], backend=0x2d79520 [FolksBackendsEdsBackend], _callback_=0, _user_data_=0x0) at individual-aggregator.c:2142
        _data_ = 0x300b2d0
        _tmp0_ = <optimized out>
        _tmp1_ = 0x2d79520 [FolksBackendsEdsBackend]
        _tmp2_ = <optimized out>
#8  0x00000036bfe0eb14 in g_closure_invoke (closure=0x2d806f0, return_value=0x0, n_param_values=2, param_values=0x300ca40, invocation_hint=<optimized out>) at gclosure.c:774
        marshal = 0x36bfe10c20 <g_cclosure_marshal_VOID__OBJECT>
        marshal_data = <optimized out>
        in_marshal = <optimized out>
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#9  0x00000036bfe21dcb in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=0x2dbcd20, emission_return=0x0, instance_and_params=0x300ca40) at gsignal.c:3272
        tmp = <optimized out>
        handler = 0x2d74f00
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x2dbcd20, ihint = {signal_id = 401, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x0
        hlist = 0x36bda0aee0
        handler_list = 0x2d74f00
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, 
              v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 401
        max_sequential_handler_number = 2660
        return_value_altered = 0
#10 0x00000036bfe2b417 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff8daa0ba8) at gsignal.c:3003
        instance_and_params = 0x300ca40
        signal_return_type = 4
        param_values = 0x300ca58
        node = 0x2d81eb0
        i = <optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#11 0x00000036bfe2b7cd in g_signal_emit_by_name (instance=0x2dbcd20, detailed_signal=0x7fd82497745e "backend-available") at gsignal.c:3097
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff8daa0d00, reg_save_area = 0x7fff8daa0c10}}
        detail = 0
        signal_id = 401
        __PRETTY_FUNCTION__ = "g_signal_emit_by_name"
#12 0x00007fd82494d4a3 in _folks_backend_store_backend_load_if_needed_co (_data_=0x2d82950) at backend-store.c:1510
        __PRETTY_FUNCTION__ = "_folks_backend_store_backend_load_if_needed_co"
#13 0x00000036c566bf41 in g_simple_async_result_complete (simple=0x7fd7ec0056a0 [GSimpleAsyncResult]) at gsimpleasyncresult.c:749
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#14 0x00000036c566c07c in complete_in_idle_cb (data=0x7fd7ec0056a0) at gsimpleasyncresult.c:761
        simple = <optimized out>
#15 0x00000036bf244a9d in g_main_dispatch (context=0x1256810) at gmain.c:2441
        dispatch = 0x36bf240860 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x7fd7ec0056a0
        callback = 0x36c566c060 <complete_in_idle_cb>
        cb_funcs = 0x36bf51f610
        cb_data = 0x3010160
        current_source_link = {data = 0x2b6e910, next = 0x0}
        need_destroy = <optimized out>
        source = 0x2b6e910
        current = 0x26b5960
        i = <optimized out>
#16 g_main_context_dispatch (context=0x1256810) at gmain.c:3011
No locals.
#17 0x00000036bf245298 in g_main_context_iterate (context=0x1256810, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = 12
        allocated_nfds = <optimized out>
        fds = <optimized out>
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#18 0x00000036bf2457e5 in g_main_loop_run (loop=0x125b370) at gmain.c:3297
        self = 0x12440e0
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#19 0x00000036c82566a1 in meta_run () from /usr/lib64/libmutter.so.0
No symbol table info available.
#20 0x00000000004029f1 in main (argc=1, argv=0x7fff8daa1068) at main.c:571
        ctx = <optimized out>
        error = 0x0
        session_type = <optimized out>
        ecode = <optimized out>
        sender = 0x24ed810 [TpDebugSender]

