SIGTRAP when sending signal on closing dbus connection

[Jean-Pierre Bogler continental-corporation com]

Hi *,

in a multi threaded application we are receiving a
SIGTRAP, while using gdbus. 
In short terms, the application is doing the following:

Thread 1: g_object_unref(connection);
Thread 2: g_dbus_connection_emit_signal(connection);

The SIGTRAP is raised when a "pthread_mutex_trylock"
fails, in the callstack of 
"g_dbus_connection_emit_signal", because
the mutex already is invalid. I assumed 
that gdbus is thread safe at this point. Is this assumption
wrong or is there really 
a bug?

In case more details are requried, please let me know.
I can easily reproduce the 
issue at my place and already implemented a small
test executable.

Best regards
Jean-Pierre