[Bug 752651] decodebin: segfault on setting to NULL

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=752651

--- Comment #38 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> ---
(In reply to Sebastian Dröge (slomo) from comment #35)
> You could connect to the signals with taking another ref on the
> chain, and having a destroy notify that unrefs the chain again.
> g_signal_connect_data().

If I take an extra ref on the chain for all the 4 places where a signal is
connected with the chain (I never release those refs), I still get crashes.
This is consistent with the chain being not yet destroyed above, so this is not
the problem. It looks like the mutex is somehow getting wrecked, but I don't
see other calls to g_mutex_clear that could explain this.

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