[Bug 768365] New: gst_poll_remove_fd: assertion 'fd->fd >= 0' failed

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=768365

            Bug ID: 768365
           Summary: gst_poll_remove_fd: assertion 'fd->fd >= 0' failed
    Classification: Platform
           Product: GStreamer
           Version: 1.8.0
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: marcin at saepia.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I am adding dynamically a branch to the audiomixer.

I have a custom bin class that basically contains shmsrc and capsfilter with
src ghost pad made from capsfilter.

I create a bin, its constructor creates internal pipeline and then I add this
bin to the parent bin and create appropriate pads on audiomixer and multiqueue
that separates the two.

Then I call sync_state_with_parent on the branch bin, and if SHM socket is
unavailable it returns false.

Then I invoke procedure to remove the branch bin which calls
set_state(Gst.State.NULL)

Then GStreamer crashes with

gst_poll_remove_fd: assertion 'fd->fd >= 0' failed

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