[Bug 646566] Protect against Pad-Parent disappearing

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=646566
  GStreamer | gstreamer (core) | git

--- Comment #17 from Håvard Graff (hgr) <havard.graff at tandberg.com> 2011-04-04 16:26:27 UTC ---
(In reply to comment #16)
> That said, I'm not sure there is anywhere outside of the unit tests where there > are pads that really have no parent.

Au contraire! This has been a common cause of crashes for us. We take out an
element, and a pad-alloc, query or event arrives just at that time. You can
never completely protect yourself against this unless you take down the whole
pipeline at the same time. Crash-dumps from customers often have one variant of
this, with the error-msg G_IS_OBJECT () as the most common one.

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