#0  _debug_assert_fail (expr=0xb78c9e7a "reg.File != TGSI_FILE_NULL", 
    file=0xb78c9d30 "../../src/gallium/auxiliary/tgsi/tgsi_ureg.h", line=790, function=0xb78ca3b1 "ureg_writemask")
        at util/u_debug.c:236
#1  0xb7190d4a in ureg_writemask (t=<value optimized out>, inst=0x13c41638) at ../../src/gallium/auxiliary/tgsi/tgsi_ureg.h:790
#2  translate_dst (t=<value optimized out>, inst=0x13c41638) at state_tracker/st_mesa_to_tgsi.c:296
#3  compile_instruction (t=<value optimized out>, inst=0x13c41638) at state_tracker/st_mesa_to_tgsi.c:659
#4  0xb7193667 in st_translate_mesa_program (ctx=0x8923db0, procType=0, ureg=0x14128ff0, program=0x14124d40, numInputs=2, 
	    inputMapping=0xbfffe79c, inputSemanticName=0xbfffe8a0 "\001\003", inputSemanticIndex=0xbfffe880 "", interpMode=0xbfffe71c, 
	        numOutputs=0, outputMapping=0xbfffe814, outputSemanticName=0xbfffe860 "\375\017", 
		    outputSemanticIndex=0xbfffe840 "\370@\216\bxW\257\b\017", passthrough_edgeflags=0 '\000')
		        at state_tracker/st_mesa_to_tgsi.c:1142
#5  0xb71961ec in st_translate_fragment_program (st=0x895b8a0, stfp=0x14124d40) at state_tracker/st_program.c:444
#6  0xb717ba2c in translate_fp (st=0x895b8a0) at state_tracker/st_atom_shader.c:64
#7  update_fp (st=0x895b8a0) at state_tracker/st_atom_shader.c:175
#8  0xb71789f5 in st_validate_state (st=0x895b8a0) at state_tracker/st_atom.c:172
#9  0xb7181125 in st_Clear (ctx=0x8923db0, mask=16) at state_tracker/st_cb_clear.c:464
#10 0xb7138fc9 in _mesa_Clear (mask=0) at main/clear.c:241
#11 0x0817b151 in GPC_Canvas::ClearBuffer(int) ()
#12 0x084157ac in RAS_OpenGLRasterizer::ClearDepthBuffer() ()
#13 0x083236d2 in KX_KetsjiEngine::RenderShadowBuffers(KX_Scene*) ()
#14 0x08323cb4 in KX_KetsjiEngine::Render() ()
#15 0x08174e58 in GPG_Application::processEvent(GHOST_IEvent*) ()
#16 0x08184311 in GHOST_EventManager::dispatchEvent(GHOST_IEvent*) ()
#17 0x081841eb in GHOST_EventManager::dispatchEvent() ()
#18 0x0818423f in GHOST_EventManager::dispatchEvents() ()
#19 0x08183891 in GHOST_System::dispatchEvents() ()
#20 0x0817358e in main ()