[Bug 759286] New: videoconvert/videotestsrc get SIGSEGV on 1.6.0 when ORC enabled on ARM A9 platform

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=759286

            Bug ID: 759286
           Summary: videoconvert/videotestsrc get SIGSEGV on 1.6.0 when
                    ORC enabled on ARM A9 platform
    Classification: Platform
           Product: GStreamer
           Version: 1.6.0
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: mingke.wang at freescale.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 317087
  --> https://bugzilla.gnome.org/attachment.cgi?id=317087&action=edit
script for loop

We recently upgrade gstreamer from 1.4.5 to gstreamer 1.6.0 and we got a crash
(SIGSEGV) problem in videotestsrc and videoconvert.
Platform: ARM A9 (Freescale I.MAX6Q)
Software: Gstreamer 1.6.0 + liborc-0.4.23

command line: 
by loop following (check the attached loop.sh):
gst-launch-1.0 videotestsrc num-buffers=100 ! video/x-raw,format=I420 !
videoconvert ! fakesink
or even
gst-launch-1.0 videotestsrc num-buffers=100 ! video/x-raw,format=I420 !
fakesink


the backtrack is :
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Caught SIGSEGV
#0  0x76c762c0 in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x76d4f854 in g_main_context_iterate (priority=<optimized out>, n_fds=2,
fds=0x3a7f78, timeout=-1, context=0x3a7db0)
#2  0x76d4f854 in g_main_context_iterate (context=0x3a7db0,
block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>)
#3  0x76d4fc0c in g_main_loop_run (loop=0x3a7c10)
#4  0x76ebea34 in gst_bus_poll (bus=bus at entry=0x2a0d48 [GstBus],
events=events at entry=GST_MESSAGE_ANY, timeout=<optimized out>)
#5  0x00013d48 in event_loop (pipeline=0x3a6098 [GstPipeline],
blocking=blocking at entry=1, do_progress=2124655120,
#6  0x00012e94 in main (argc=1993417836, argv=0x46f)
Spinning.  Please run 'gdb gst-launch-1.0 25103' to continue debugging, Ctrl-C
to quit, or Ctrl-\ to dump core.

the crash time is not fix, sometime only need loop several times, sometimes
need loop several minutes.

Gstreamer 1.4.5 has no problem.
Gstreamer 1.6.0 on PC platform has no problem

by further investigation, the crash should comes from vidoe-orc.orc, when I
disable the ORC in video-orc.orc (check the attached patch), then it works
fine.

updating the liborc to 0.4.24 helps nothing.

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