StacktraceTop: g_type_check_instance_cast (type_instance=0x556f547c8790, iface_type=93936654741120) at ../../../../gobject/gtype.c:4057 ext_ubuntu_dock_placement_changed_callback (settings=<optimized out>, key=<optimized out>, user_data=<optimized out>) at cc-ubuntu-panel.c:258 g_closure_invoke (closure=0x556f54703100, return_value=0x0, n_param_values=2, param_values=0x7ffd9dcc9c60, invocation_hint=0x7ffd9dcc9be0) at ../../../../gobject/gclosure.c:804 signal_emit_unlocked_R (node=node@entry=0x556f53f95a00, detail=detail@entry=4427, instance=instance@entry=0x556f544e7700, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffd9dcc9c60) at ../../../../gobject/gsignal.c:3635 g_signal_emit_valist (instance=0x556f544e7700, signal_id=<optimized out>, detail=4427, var_args=var_args@entry=0x7ffd9dcc9e30) at ../../../../gobject/gsignal.c:3391
StacktraceTop: check_instance_ cast (type_instance= 0x556f547c8790, iface_type= 93936654741120) at ../../. ./../gobject/ gtype.c: 4057 dock_placement_ changed_ callback (settings= <optimized out>, key=<optimized out>, user_data= <optimized out>) at cc-ubuntu- panel.c: 258 0x556f54703100, return_value=0x0, n_param_values=2, param_values= 0x7ffd9dcc9c60, invocation_ hint=0x7ffd9dcc 9be0) at ../../. ./../gobject/ gclosure. c:804 emit_unlocked_ R (node=node@ entry=0x556f53f 95a00, detail= detail@ entry=4427, instance= instance@ entry=0x556f544 e7700, emission_ return= emission_ return@ entry=0x0, instance_ and_params= instance_ and_params@ entry=0x7ffd9dc c9c60) at ../../. ./../gobject/ gsignal. c:3635 emit_valist (instance= 0x556f544e7700, signal_ id=<optimized out>, detail=4427, var_args= var_args@ entry=0x7ffd9dc c9e30) at ../../. ./../gobject/ gsignal. c:3391
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ext_ubuntu_
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signal_
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