[Bug 767555] New: 'mini_object->refcount > 0' failed

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=767555

            Bug ID: 767555
           Summary: 'mini_object->refcount > 0' failed
    Classification: Platform
           Product: GStreamer
           Version: 1.6.3
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: 1992184780 at qq.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Hello 
I can not get rid of the error ,following is the valgrind shows . Any one help
to fix it ?
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
==14360== Thread 1:
==14360== Invalid read of size 4
==14360==    at 0x48A0F1C: gst_mini_object_unref (gstminiobject.c:442)
==14360==    by 0x4961953: g_value_unset (in
/usr/lib/libgobject-2.0.so.0.4600.2)
==14360==  Address 0x50d3bec is 4 bytes inside a block of size 160 free'd
==14360==    at 0x482E8CC: free (vg_replace_malloc.c:530)
==14360==    by 0x551506F: gst_buffer_unref (gstbuffer.h:364)
==14360==    by 0x551506F:
gst_matroska_demux_parse_blockgroup_or_simpleblock.isra.13
(matroska-demux.c:3742)
==14360==    by 0x551D82B: gst_matroska_demux_parse_id (matroska-demux.c:4367)
==14360==    by 0x551E907: gst_matroska_demux_loop (matroska-demux.c:4543)
==14360==    by 0x48DAB0B: gst_task_func (gsttask.c:331)
==14360==    by 0x49E6453: ??? (in /usr/lib/libglib-2.0.so.0.4600.2)
==14360==  Block was alloc'd at
==14360==    at 0x482D35C: malloc (vg_replace_malloc.c:299)
==14360==    by 0x49C9A87: g_malloc (in /usr/lib/libglib-2.0.so.0.4600.2)
==14360== 

(gst-launch-1.0:14360): GStreamer-CRITICAL **: gst_mini_object_unref: assertion
'mini_object->refcount > 0' failed

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