#0  0x00007fff5a410a00 in debug () at gstglimagesink.c:925
#1  0x00007fff5a410dac in gst_glimage_sink_change_state (element=0x7452e0, transition=GST_STATE_CHANGE_READY_TO_NULL) at gstglimagesink.c:1042
#2  0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#3  0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#4  0x00007fffee8acad3 in gst_bin_change_state_func () at /lib64/libgstreamer-1.0.so.0
#5  0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#6  0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#7  0x00007fffee8acad3 in gst_bin_change_state_func () at /lib64/libgstreamer-1.0.so.0
#8  0x00007fff59dd5114 in fps_display_sink_change_state (element=0x45a340, transition=GST_STATE_CHANGE_READY_TO_NULL) at fpsdisplaysink.c:667
#9  0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#10 0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#11 0x00007fffee8acad3 in gst_bin_change_state_func () at /lib64/libgstreamer-1.0.so.0
#12 0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#13 0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#14 0x00007fff8041370a in activate_chain (chain=0x7fff3c1e0e40, activate=activate@entry=0)
    at gstplaysink.c:1257
#15 0x00007fff804157df in gst_play_sink_change_state (activate=0, chain=<optimized out>) at gstplaysink.c:1400
#16 0x00007fff804157df in gst_play_sink_change_state (element=0x79e120, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstplaysink.c:4896
#17 0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#18 0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#19 0x00007fffee8acad3 in gst_bin_change_state_func () at /lib64/libgstreamer-1.0.so.0
#20 0x00007fff804104fb in gst_play_bin_change_state (element=0xa93c90, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstplaybin2.c:5675
#21 0x00007fffee8cce32 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#22 0x00007fffee8cd018 in gst_element_change_state () at /lib64/libgstreamer-1.0.so.0
#23 0x00007fffee8cd427 in gst_element_set_state_func () at /lib64/libgstreamer-1.0.so.0
#24 0x00007ffff6def5cc in WebCore::MediaPlayerPrivateGStreamer::changePipelineState(GstState) ()
    at /home/changseok/Projects/webkit-clutter/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#25 0x00007ffff6df1d68 in WebCore::MediaPlayerPrivateGStreamer::didEnd() ()
    at /home/changseok/Projects/webkit-clutter/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#26 0x00007ffff6df2260 in WebCore::MediaPlayerPrivateGStreamer::handleMessage(_GstMessage*) ()
    at /home/changseok/Projects/webkit-clutter/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
---Type <return> to continue, or q <return> to quit---
#27 0x00007ffff1c1b5be in g_cclosure_marshal_VOID__BOXEDv () at /lib64/libgobject-2.0.so.0
#28 0x00007ffff1c189d4 in _g_closure_invoke_va () at /lib64/libgobject-2.0.so.0
#29 0x00007ffff1c332bd in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0
#30 0x00007ffff1c338ff in g_signal_emit () at /lib64/libgobject-2.0.so.0
#31 0x00007fffee8b4682 in gst_bus_async_signal_func () at /lib64/libgstreamer-1.0.so.0
#32 0x00007fffee8b5436 in gst_bus_source_dispatch () at /lib64/libgstreamer-1.0.so.0
#33 0x00007ffff1919e3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#34 0x00007ffff191a1d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#35 0x00007ffff191a4f2 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#36 0x00007ffff74417c0 in WTF::RunLoop::run() ()
    at /home/changseok/Projects/webkit-clutter/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#37 0x00007ffff6068922 in int WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebProcessMain>(int, char**) () at /home/changseok/Projects/webkit-clutter/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#38 0x00007fffe92ff580 in __libc_start_main () at /lib64/libc.so.6
#39 0x0000000000400c99 in _start ()