[Bug 758703] v4l2src: gst_v4l2_set_attribute warning messages cause infinite loop with .dot dump

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=758703

Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #9 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> ---
Ok, now it make sense. Specifically, gst-launch-1.0 try to dump the pipeline
graph on warning. Now, the root problem is that posting warning (or even error)
on the bus upon property change shall never happen. We need to find where
and/or if those warning message make sense anywhere else (might be artefact of
the past). I'd suggest to remove the warning completely from that helper and
add a return value. So the caller will decide if / when / how to warn.

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