[Bug 648297] New: [bus] regression: critical assertion failure

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=648297
  GStreamer | gstreamer (core) | git

           Summary: [bus] regression: critical assertion failure
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: blocker
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: mnauw at users.sourceforge.net
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=186355)
 View: https://bugzilla.gnome.org/attachment.cgi?id=186355
 Review: https://bugzilla.gnome.org/review?bug=648297&attachment=186355

bus: also allow untimed popping of a message if no poll available 

Specifically:

GStreamer-CRITICAL **: gst_bus_timed_pop_filtered: assertion `bus->priv->poll
!= NULL'

Happens when having a pipeline in a pipeline and then changing state back to
NULL.  The interior pipeline will/might then flush the bus, which is a child
bus from the parent which does not have a poll anymore these days.

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