#0  0x0000000081564b98 in ?? ()
No symbol table info available.
#1  0x00000000012e9590 in ?? ()
No symbol table info available.
#2  0x00007fb5820fcced in signal_emit_unlocked_R (node=<optimized out>, detail=789, instance=<optimized out>, emission_return=0x0, instance_and_params=0x7fff5c1988d0) at /build/buildd/glib2.0-2.32.4/./gobject/gsignal.c:3685
        accumulator = 0x0
        emission = {next = 0x7fb57dbeed20 <ffi_type_pointer>, instance = 0x12c82d0, ihint = {signal_id = 1, detail = 789, run_type = G_SIGNAL_RUN_CLEANUP}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x7fb57dbeed20 <ffi_type_pointer>
        hlist = 0x13c3a00
        handler_list = 0x12d60e0
        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 = 1
        max_sequential_handler_number = 20757264
        return_value_altered = 1
#3  0x00007fb5821050b0 in g_signal_emit_valist (instance=<error reading variable: Cannot access memory at address 0x2fffffe4d>, signal_id=<optimized out>, detail=<error reading variable: Cannot access memory at address 0x2fffffe41>, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.4/./gobject/gsignal.c:3330
        instance_and_params = <error reading variable instance_and_params (Cannot access memory at address 0x2fffffe5d)>
        signal_return_type = <error reading variable signal_return_type (Cannot access memory at address 0x2fffffe35)>
        param_values = <error reading variable param_values (Cannot access memory at address 0x2fffffe2d)>
        node = 0x7fb57dbeed20 <ffi_type_pointer>
        i = <optimized out>
        n_params = <error reading variable n_params (Cannot access memory at address 0x2fffffe3d)>
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
Backtrace stopped: previous frame inner to this frame (corrupt stack?)