Bug 58716

Mesa 9.0 software rasterizer (mesa/drivers/windows/gdi) compiled with MS VC++ 2010 for Win32 platform crashes under Windows 7 64-bit on glDrawArrays() call with the following console message:

Mesa 9.0 implementation error: unsupported unpack for format MESA_FORMAT_NONE
Please report at bugs.freedesktop.org

The stack dump as reported by MS VC++ 2010 debugger:

 	00000000	
	_mesa_unpack_rgba_row(gl_format format=MESA_FORMAT_NONE, unsigned int n=127, const void * src=0xabababab, float [4]* dst=0x03ab0020) Line 1624	C
 	get_row(gl_context * ctx=0x03c00fd8, gl_renderbuffer * rb=0x01015d80, unsigned int count=0, int x=0, int y=0, void * values=0x03ab0020, unsigned int type=5126) Line 1557	C
 	_swrast_get_dest_rgba(gl_context * ctx=0x00000000, gl_renderbuffer * rb=0x00000000, sw_span * span=0x0028bb40) Line 1586	C
 	_swrast_write_rgba_span(gl_context * ctx=0x03c00fd8, sw_span * span=0x00000000) Line 1362	C
 	general_triangle(gl_context * ctx=0x03c00fd8, const SWvertex * v0=0x04000040, const SWvertex * v1=0x04000248, const SWvertex * v2=0x04000860) Line 819	C
 	_swrast_validate_triangle(gl_context * ctx=0x03c00fd8, const SWvertex * v0=0x04000040, const SWvertex * v1=0x04000248, const SWvertex * v2=0x04000860) Line 365	C
 	triangle_rgba(gl_context * ctx=0x03c00fd8, unsigned int e0=0, unsigned int e1=1, unsigned int e2=4) Line 176	C
 	_tnl_render_poly_elts(gl_context * ctx=0x03c00fd8, unsigned int start=0, unsigned int count=4, unsigned int flags=48) Line 352	C
 	_tnl_RenderClippedPolygon(gl_context * ctx=0x03c00fd8, const unsigned int * elts=0x0028c924, unsigned int n=4) Line 245	C
 	clip_quad_4(gl_context * ctx=0x03c00fd8, unsigned int v0=0, unsigned int v1=1, unsigned int v2=2, unsigned int v3=3, unsigned char mask='') Line 310	C
 	clip_render_quads_verts(gl_context * ctx=0x03c00f00, unsigned int start=0, unsigned int count=4, unsigned int flags=55) Line 383	C
 	run_render(gl_context * ctx=0x03c00fd8, tnl_pipeline_stage * stage=0x03c7a9f0) Line 321	C
 	_tnl_run_pipeline(gl_context * ctx=0x03c0027f) Line 163	C
 	_tnl_draw_prims(gl_context * ctx=0x03c00fd8, const gl_client_array * * arrays=0x03c688d8, const _mesa_prim * prim=0x0028cb70, unsigned int nr_prims=1, const _mesa_index_buffer * ib=0x00000000, unsigned int min_index=0, unsigned int max_index=3) Line 526	C
 	_tnl_vbo_draw_prims(gl_context * ctx=0x03c688d8, const _mesa_prim * prim=0x0028cb70, unsigned int nr_prims=1, const _mesa_index_buffer * ib=0x00000000, unsigned char index_bounds_valid='', unsigned int min_index=0, unsigned int max_index=3, gl_transform_feedback_object * tfb_vertcount=0x00000000) Line 424	C
 	vbo_draw_arrays(gl_context * ctx=0x03c00fd8, unsigned int mode=7, int start=0, int count=4, unsigned int numInstances=1, unsigned int baseInstance=0) Line 647	C
 	vbo_exec_DrawArrays(unsigned int mode=7, int start=0, int count=4) Line 675	C
 	GLWidget::paintGL() Line 208	C++
 
Sample MS VC++ 2010 project (based on Qt 4.4.3 open-source edition) that can be used to reproduce the problem is attached. 
Qt 4.4.3 open-source edition can be found here: ftp://ftp.qt.nokia.com/qt/source/.