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Allison Karlitskaya authored
GDBusConnection recently changed to dispatching its GDestroyNotify calls from an idle instead of on-the-spot. Under the previous regime, we would destroy-notify the action group export of a GtkApplicationWindow at the point it was removed from the application (ie: slightly before being disposed). With the destroy notify now deferred to an idle, the window has already been disposed, so the signal handlers have already been disconnected. Avoid the problem by dropping our use of signal IDs and just do g_signal_handlers_disconnect_by_func(), which doesn't complain if there is no connection.
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