Comment 2 for bug 1216330

StacktraceTop:
 egg_tree_multi_drag_button_press_event (widget=0x14345a0, event=0x47, data=<optimized out>) at eggtreemultidnd.c:365
 g_closure_invoke (closure=0x2, return_value=0x7fffded2a840, n_param_values=3738347760, param_values=0x7fffded2a890, invocation_hint=0x0) at /build/buildd/glib2.0-2.37.6/./gobject/gclosure.c:777
 signal_emit_unlocked_R (node=node@entry=0x1294810, detail=detail@entry=0, instance=instance@entry=0x14345a0, emission_return=emission_return@entry=0x7fffded2a9c0, instance_and_params=instance_and_params@entry=0x7fffded2a8f0) at /build/buildd/glib2.0-2.37.6/./gobject/gsignal.c:3582
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffded2aa88) at /build/buildd/glib2.0-2.37.6/./gobject/gsignal.c:3336
 g_signal_emit (instance=instance@entry=0x14345a0, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.37.6/./gobject/gsignal.c:3382