Bug 31587

(In reply to comment #0)
> Running the cairo-vg tests.
> 
> Program received signal SIGSEGV, Segmentation fault.
> __pthread_mutex_lock (mutex=0x8) at pthread_mutex_lock.c:50
> 50    pthread_mutex_lock.c: No such file or directory.
>     in pthread_mutex_lock.c
> (gdb) bt
> #0  __pthread_mutex_lock (mutex=0x8) at pthread_mutex_lock.c:50
> #1  0x00002aaaae3663d3 in lp_fence_wait (f=0x0) at lp_fence.c:116
> #2  0x00002aaaae3583bc in llvmpipe_fence_finish (screen=<value optimized out>, 
>     fence_handle=0x0, flag=0) at lp_screen.c:363
cc5c908d7deab59f3512e1a5762fd058c4ae5940 should fix the NULL pointer dereference here.  Could you try again?
> #3  0x00002aaaaf7b6ddf in vegaFinish () at api_context.c:77
> #4  0x00002aaaaad3f7d3 in _vg_get_image (surface=0x74f830, 
>     x=<value optimized out>, y=<value optimized out>, width=1000, height=800, 
>     image_out=0x7fffffffabd8) at cairo-vg-surface.c:1407
> #5  0x00002aaaaad175d7 in _cairo_surface_acquire_dest_image (surface=0x8, 
>     interest_rect=0x0, image_out=0x7fffffffabd8, image_rect=0x2aaaae94700b, 
>     image_extra=0x74fa50) at cairo-surface.c:1519
> #6  0x00002aaaaad1982d in _fallback_init (state=0x7fffffffabc0, dst=0x8, 
>     x=<value optimized out>, y=<value optimized out>, 
>     width=<value optimized out>, height=3145728) at cairo-surface-fallback.c:86
> #7  0x00002aaaaad19b7b in _cairo_surface_fallback_fill_rectangles (
>     surface=<value optimized out>, op=CAIRO_OPERATOR_CLEAR, 
>     color=0x2aaaaad58b40, rects=0x7fffffffac90, num_rects=1)
>     at cairo-surface-fallback.c:1488
> #8  0x00002aaaaad16bf1 in _cairo_surface_fill_rectangles (surface=0x74f830, 
>     op=CAIRO_OPERATOR_CLEAR, color=0x2aaaaad58b40, rects=0x7fffffffac90, 
>     num_rects=1) at cairo-surface.c:1966
> #9  0x00002aaaaad16e20 in _cairo_surface_fill_region (surface=0x74f830, 
> ---Type <return> to continue, or q <return> to quit---
>     op=CAIRO_OPERATOR_CLEAR, color=0x2aaaaad58b40, 
>     region=<value optimized out>) at cairo-surface.c:1916
> #10 0x00002aaaaad1b4c7 in _clip_and_composite_region (src=0x2aaaaad5be20, 
>     op=CAIRO_OPERATOR_CLEAR, dst=0x74f830, traps=0x7fffffffb670, 
>     antialias=<value optimized out>, clip=0x0, extents=0x7fffffffbd90)
>     at cairo-surface-fallback.c:617
> #11 _clip_and_composite_trapezoids (src=0x2aaaaad5be20, 
>     op=CAIRO_OPERATOR_CLEAR, dst=0x74f830, traps=0x7fffffffb670, 
>     antialias=<value optimized out>, clip=0x0, extents=0x7fffffffbd90)
>     at cairo-surface-fallback.c:846
> #12 0x00002aaaaad1bfc5 in _cairo_surface_fallback_paint (surface=0x74f830, 
>     op=CAIRO_OPERATOR_CLEAR, source=0x2aaaaad5be20, clip=0x0)
>     at cairo-surface-fallback.c:935
> #13 0x00002aaaaad18aa1 in _cairo_surface_paint (surface=0x74f830, 
>     op=CAIRO_OPERATOR_CLEAR, source=0x2aaaaad5be20, clip=0x0)
>     at cairo-surface.c:2028
> #14 0x00002aaaaacef512 in _cairo_gstate_paint (gstate=0x2aaaaaf7a9c8)
>     at cairo-gstate.c:1049
> #15 0x00002aaaaace60b4 in *INT_cairo_paint (cr=0x2aaaaaf7a800) at cairo.c:2232
> #16 0x000000000040b0d4 in cairo_test_for_target (ctx=0x7fffffffd790, 
>     target=0x663be0, dev_offset=<value optimized out>, 
>     similar=<value optimized out>) at cairo-test.c:970
> ---Type <return> to continue, or q <return> to quit---
> #17 0x000000000040c927 in _cairo_test_context_run_for_target (
>     ctx=<value optimized out>, target=<value optimized out>, 
>     similar=<value optimized out>, dev_offset=<value optimized out>)
>     at cairo-test.c:1617
> #18 0x000000000040dd99 in _cairo_test_runner_draw (argc=<value optimized out>, 
>     argv=<value optimized out>) at cairo-test-runner.c:269
> #19 main (argc=<value optimized out>, argv=<value optimized out>)
>     at cairo-test-runner.c:924

I got a FPE a little further, this time in vgDrawPath. Still null pointers

Program received signal SIGFPE, Arithmetic exception.
0x00002aaaaeac6e5b in llvm::LiveIntervals::addIntervalsForSpills(llvm::LiveInterval const&, llvm::SmallVectorImpl<llvm::LiveInterval*>&, llvm::MachineLoopInfo const*, llvm::VirtRegMap&) () from /usr/lib64/egl/pipe_swrast.so
(gdb) bt
#0  0x00002aaaaeac6e5b in llvm::LiveIntervals::addIntervalsForSpills(llvm::LiveInterval const&, llvm::SmallVectorImpl<llvm::LiveInterval*>&, llvm::MachineLoopInfo const*, llvm::VirtRegMap&) () from /usr/lib64/egl/pipe_swrast.so
#1  0x00002aaaaea69088 in (anonymous namespace)::StandardSpiller::spill(llvm::LiveInterval*, llvm::SmallVectorImpl<llvm::LiveInterval*>&, llvm::SlotIndex*)
    () from /usr/lib64/egl/pipe_swrast.so
#2  0x00002aaaaea3bbd2 in (anonymous namespace)::RALinScan::assignRegOrStackSlotAtInterval(llvm::LiveInterval*) () from /usr/lib64/egl/pipe_swrast.so
#3  0x00002aaaaea3dd60 in (anonymous namespace)::RALinScan::linearScan() ()
   from /usr/lib64/egl/pipe_swrast.so
#4  0x00002aaaaea3eb48 in (anonymous namespace)::RALinScan::runOnMachineFunction(llvm::MachineFunction&) () from /usr/lib64/egl/pipe_swrast.so
#5  0x00002aaaaecf831c in llvm::FPPassManager::runOnFunction(llvm::Function&)
    () from /usr/lib64/egl/pipe_swrast.so
#6  0x00002aaaaecf84b4 in llvm::FunctionPassManagerImpl::run(llvm::Function&)
    () from /usr/lib64/egl/pipe_swrast.so
#7  0x00002aaaaecf86ae in llvm::FunctionPassManager::run(llvm::Function&) ()
   from /usr/lib64/egl/pipe_swrast.so
#8  0x00002aaaae9cb0ac in llvm::JIT::runJITOnFunctionUnlocked(llvm::Function*, llvm::MutexGuard const&) () from /usr/lib64/egl/pipe_swrast.so
#9  0x00002aaaae9cb474 in llvm::JIT::getPointerToFunction(llvm::Function*) ()
   from /usr/lib64/egl/pipe_swrast.so
---Type <return> to continue, or q <return> to quit---
#10 0x00002aaaae9e3f56 in llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) () from /usr/lib64/egl/pipe_swrast.so
#11 0x00002aaaae7d3172 in draw_llvm_generate (llvm=<value optimized out>, 
    variant=<value optimized out>) at draw/draw_llvm.c:1189
#12 0x00002aaaae7d3a50 in draw_llvm_create_variant (llvm=0x705070, 
    num_inputs=<value optimized out>, key=0x7fffffffb710)
    at draw/draw_llvm.c:326
#13 0x00002aaaae7d5683 in llvm_middle_end_prepare (middle=0x71efe0, 
    in_prim=<value optimized out>, opt=<value optimized out>, 
    max_vertices=<value optimized out>)
    at draw/draw_pt_fetch_shade_pipeline_llvm.c:161
#14 0x00002aaaae7a9745 in vsplit_prepare (frontend=0x71c1d0, in_prim=0, 
    middle=0x7dc210, opt=0) at draw/draw_pt_vsplit.c:170
#15 0x00002aaaae7a588b in draw_pt_arrays (draw=<value optimized out>, prim=6, 
    start=0, count=4) at draw/draw_pt.c:111
#16 0x00002aaaae7a5a6d in draw_vbo (draw=0x703f10, info=0x7fffffffbaf0)
    at draw/draw_pt.c:481
#17 0x00002aaaae784350 in llvmpipe_draw_vbo (pipe=0x702fa0, 
    info=0x7fffffffbaf0) at lp_draw_arrays.c:81
#18 0x00002aaaafc0680a in util_draw_arrays (pipe=0x702fa0, 
    vbuf=<value optimized out>, offset=<value optimized out>, prim_type=6, 
    num_verts=4, num_attribs=<value optimized out>) at ./util/u_draw.h:58
---Type <return> to continue, or q <return> to quit---
#19 util_draw_vertex_buffer (pipe=0x702fa0, vbuf=<value optimized out>, 
    offset=<value optimized out>, prim_type=6, num_verts=4, 
    num_attribs=<value optimized out>) at util/u_draw_quad.c:63
#20 0x00002aaaafbf54a6 in renderer_draw_quad (r=0x74dfc0, 
    x1=<value optimized out>, y1=<value optimized out>, 
    x2=<value optimized out>, y2=<value optimized out>, 
    depth=<value optimized out>) at renderer.c:217
#21 0x00002aaaafbc0b77 in surface_fill (x=<value optimized out>, 
    y=<value optimized out>, width=<value optimized out>, 
    height=<value optimized out>, value=<value optimized out>) at mask.c:392
#22 mask_fill (x=<value optimized out>, y=<value optimized out>, 
    width=<value optimized out>, height=<value optimized out>, 
    value=<value optimized out>) at mask.c:678
#23 0x00002aaaafbc05f1 in setup_new_alpha_mask (ctx=0x74ae70)
    at vg_manager.c:123
#24 vg_context_update_draw_buffer (ctx=0x74ae70) at vg_manager.c:258
#25 vg_manager_validate_framebuffer (ctx=0x74ae70) at vg_manager.c:313
#26 0x00002aaaafbdd2f4 in vg_validate_state (ctx=0x6bda50) at vg_context.c:345
#27 0x00002aaaafbed408 in path_render (p=0x753650, paintModes=2)
    at path.c:1527
#28 0x00002aaaaad4fab5 in _vg_surface_paint (abstract_surface=0x752880, 
    op=<value optimized out>, source=<value optimized out>, clip=0x0)
---Type <return> to continue, or q <return> to quit---
    at cairo-vg-surface.c:1259
#29 0x00002aaaaad19f57 in _cairo_surface_paint (surface=0x752880, 
    op=CAIRO_OPERATOR_OVER, source=0x7fffffffbe40, clip=0x0)
    at cairo-surface.c:2023
#30 0x00002aaaaacf0a42 in _cairo_gstate_paint (gstate=0x2aaaaaf8db28)
    at cairo-gstate.c:1049
#31 0x00002aaaaace75e4 in *INT_cairo_paint (cr=0x2aaaaaf8d960) at cairo.c:2232
#32 0x000000000040f2e4 in draw (cr=0x2aaaaaf8d960, 
    width=<value optimized out>, height=<value optimized out>) at a1-bug.c:41
#33 0x000000000040bbb3 in cairo_test_for_target (ctx=0x7fffffffd7a0, 
    target=0x666bc0, dev_offset=<value optimized out>, 
    similar=<value optimized out>) at cairo-test.c:984
#34 0x000000000040d387 in _cairo_test_context_run_for_target (
    ctx=<value optimized out>, target=<value optimized out>, 
    similar=<value optimized out>, dev_offset=<value optimized out>)
    at cairo-test.c:1617
#35 0x000000000040e7f9 in _cairo_test_runner_draw (
    argc=<value optimized out>, argv=<value optimized out>)
    at cairo-test-runner.c:269
#36 main (argc=<value optimized out>, argv=<value optimized out>)
    at cairo-test-runner.c:924
(gdb) bt
#0  0x00002aaaaeac6e5b in llvm::LiveIntervals::addIntervalsForSpills(llvm::LiveInterval const&, llvm::SmallVectorImpl<llvm::LiveInterval*>&, llvm::MachineLoopInfo const*, llvm::VirtRegMap&) () from /usr/lib64/egl/pipe_swrast.so
#1  0x00002aaaaea69088 in (anonymous namespace)::StandardSpiller::spill(llvm::LiveInterval*, llvm::SmallVectorImpl<llvm::LiveInterval*>&, llvm::SlotIndex*)
    () from /usr/lib64/egl/pipe_swrast.so
#2  0x00002aaaaea3bbd2 in (anonymous namespace)::RALinScan::assignRegOrStackSlotAtInterval(llvm::LiveInterval*) () from /usr/lib64/egl/pipe_swrast.so
#3  0x00002aaaaea3dd60 in (anonymous namespace)::RALinScan::linearScan() ()
   from /usr/lib64/egl/pipe_swrast.so
#4  0x00002aaaaea3eb48 in (anonymous namespace)::RALinScan::runOnMachineFunction(llvm::MachineFunction&) () from /usr/lib64/egl/pipe_swrast.so
#5  0x00002aaaaecf831c in llvm::FPPassManager::runOnFunction(llvm::Function&)
    () from /usr/lib64/egl/pipe_swrast.so
#6  0x00002aaaaecf84b4 in llvm::FunctionPassManagerImpl::run(llvm::Function&)
    () from /usr/lib64/egl/pipe_swrast.so
#7  0x00002aaaaecf86ae in llvm::FunctionPassManager::run(llvm::Function&) ()
   from /usr/lib64/egl/pipe_swrast.so
#8  0x00002aaaae9cb0ac in llvm::JIT::runJITOnFunctionUnlocked(llvm::Function*, llvm::MutexGuard const&) () from /usr/lib64/egl/pipe_swrast.so
#9  0x00002aaaae9cb474 in llvm::JIT::getPointerToFunction(llvm::Function*) ()
   from /usr/lib64/egl/pipe_swrast.so
---Type <return> to continue, or q <return> to quit---
#10 0x00002aaaae9e3f56 in llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) () from /usr/lib64/egl/pipe_swrast.so
#11 0x00002aaaae7d3172 in draw_llvm_generate (llvm=<value optimized out>, 
    variant=<value optimized out>) at draw/draw_llvm.c:1189
#12 0x00002aaaae7d3a50 in draw_llvm_create_variant (llvm=0x705070, 
    num_inputs=<value optimized out>, key=0x7fffffffb710)
    at draw/draw_llvm.c:326
#13 0x00002aaaae7d5683 in llvm_middle_end_prepare (middle=0x71efe0, 
    in_prim=<value optimized out>, opt=<value optimized out>, 
    max_vertices=<value optimized out>)
    at draw/draw_pt_fetch_shade_pipeline_llvm.c:161
#14 0x00002aaaae7a9745 in vsplit_prepare (frontend=0x71c1d0, in_prim=0, 
    middle=0x7dc210, opt=0) at draw/draw_pt_vsplit.c:170
#15 0x00002aaaae7a588b in draw_pt_arrays (draw=<value optimized out>, prim=6, 
    start=0, count=4) at draw/draw_pt.c:111
#16 0x00002aaaae7a5a6d in draw_vbo (draw=0x703f10, info=0x7fffffffbaf0)
    at draw/draw_pt.c:481
#17 0x00002aaaae784350 in llvmpipe_draw_vbo (pipe=0x702fa0, 
    info=0x7fffffffbaf0) at lp_draw_arrays.c:81
#18 0x00002aaaafc0680a in util_draw_arrays (pipe=0x702fa0, 
    vbuf=<value optimized out>, offset=<value optimized out>, prim_type=6, 
    num_verts=4, num_attribs=<value optimized out>) at ./util/u_draw.h:58
---Type <return> to continue, or q <return> to quit---
#19 util_draw_vertex_buffer (pipe=0x702fa0, vbuf=<value optimized out>, 
    offset=<value optimized out>, prim_type=6, num_verts=4, 
    num_attribs=<value optimized out>) at util/u_draw_quad.c:63
#20 0x00002aaaafbf54a6 in renderer_draw_quad (r=0x74dfc0, 
    x1=<value optimized out>, y1=<value optimized out>, 
    x2=<value optimized out>, y2=<value optimized out>, 
    depth=<value optimized out>) at renderer.c:217
#21 0x00002aaaafbc0b77 in surface_fill (x=<value optimized out>, 
    y=<value optimized out>, width=<value optimized out>, 
    height=<value optimized out>, value=<value optimized out>) at mask.c:392
#22 mask_fill (x=<value optimized out>, y=<value optimized out>, 
    width=<value optimized out>, height=<value optimized out>, 
    value=<value optimized out>) at mask.c:678
#23 0x00002aaaafbc05f1 in setup_new_alpha_mask (ctx=0x74ae70)
    at vg_manager.c:123
#24 vg_context_update_draw_buffer (ctx=0x74ae70) at vg_manager.c:258
#25 vg_manager_validate_framebuffer (ctx=0x74ae70) at vg_manager.c:313
#26 0x00002aaaafbdd2f4 in vg_validate_state (ctx=0x6bda50) at vg_context.c:345
#27 0x00002aaaafbed408 in path_render (p=0x753650, paintModes=2)
    at path.c:1527
#28 0x00002aaaaad4fab5 in _vg_surface_paint (abstract_surface=0x752880, 
    op=<value optimized out>, source=<value optimized out>, clip=0x0)

(gdb) frame 11
#11 0x00002aaaae7d3172 in draw_llvm_generate (llvm=<value optimized out>, 
    variant=<value optimized out>) at draw/draw_llvm.c:1189
1189	   code = LLVMGetPointerToGlobal(llvm->draw->engine, variant->function);
(gdb) list
1184	   if (gallivm_debug & GALLIVM_DEBUG_IR) {
1185	      lp_debug_dump_value(variant->function);
1186	      debug_printf("\n");
1187	   }
1188	
1189	   code = LLVMGetPointerToGlobal(llvm->draw->engine, variant->function);
1190	   variant->jit_func = (draw_jit_vert_func)pointer_to_func(code);
1191	
1192	   if (gallivm_debug & GALLIVM_DEBUG_ASM) {
1193	      lp_disassemble(code);

(gdb) frame 12
#12 0x00002aaaae7d3a50 in draw_llvm_create_variant (llvm=0x705070, 
    num_inputs=<value optimized out>, key=0x7fffffffb710)
    at draw/draw_llvm.c:326
326	   draw_llvm_generate(llvm, variant);

(gdb) print *llvm
$12 = {draw = 0x703f10, jit_context = {vs_constants = 0x0, 
    gs_constants = 0x0, planes = 0x0, viewport = 0x0, textures = {{width = 0, 
        height = 0, depth = 0, last_level = 0, row_stride = {
          0 <repeats 16 times>}, img_stride = {0 <repeats 16 times>}, data = {
          0x0 <repeats 16 times>}, min_lod = 0, max_lod = 0, lod_bias = 0, 
        border_color = {0, 0, 0, 0}} <repeats 16 times>}}, 
  vs_variants_list = {base = 0x0, next = 0x706398, prev = 0x706398}, 
  nr_variants = 0, module = 0x6f19e0, engine = 0x693320, provider = 0x6f19e0, 
  target = 0x6909d0, pass = 0x6f38e0, context_ptr_type = 0x715960, 
  vertex_header_ptr_type = 0x7735b0, buffer_ptr_type = 0x715a50, 
  vb_ptr_type = 0x715e50}
(gdb) print *key
$13 = {nr_vertex_elements = 2, nr_samplers = 0, clip_xy = 1, clip_z = 1, 
  clip_user = 0, clip_halfz = 0, bypass_viewport = 0, need_edgeflags = 0, 
  nr_planes = 6, pad = 0, vertex_element = {{src_offset = 0, 
      instance_divisor = 0, vertex_buffer_index = 0, 
      src_format = PIPE_FORMAT_R32G32B32A32_FLOAT}}}
(gdb) print *shader
$14 = {base = {draw = 0x703f10, state = {tokens = 0x756050}, info = {
      num_tokens = 8, num_inputs = 1 '\001', num_outputs = 1 '\001', 
      input_semantic_name = '\000' <repeats 31 times>, 
      input_semantic_index = '\000' <repeats 31 times>, 
      input_interpolate = '\000' <repeats 31 times>, 
      input_centroid = '\000' <repeats 31 times>, 
      input_usage_mask = "\017", '\000' <repeats 30 times>, 
      input_cylindrical_wrap = '\000' <repeats 31 times>, 
      output_semantic_name = '\000' <repeats 31 times>, 
      output_semantic_index = '\000' <repeats 31 times>, file_mask = {0, 3, 
        1, 1, 1, 0, 0, 0, 0, 0, 0, 0}, file_count = {0, 2, 1, 1, 1, 0, 0, 0, 
        0, 0, 0, 0}, file_max = {-1, 1, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1}, 
      immediate_count = 0, num_instructions = 4, opcode_count = {0, 1, 0, 0, 
        0, 0, 0, 1, 1, 0 <repeats 108 times>, 1, 0 <repeats 27 times>}, 
      writes_z = 0 '\000', writes_stencil = 0 '\000', 
      writes_edgeflag = 0 '\000', uses_kill = 0 '\000', indirect_files = 0, 
      properties = {{name = 0, data = {0, 0, 0, 0, 0, 0, 0, 0}}, {name = 0, 
          data = {0, 0, 0, 0, 0, 0, 0, 0}}, {name = 0, data = {0, 0, 0, 0, 0, 
            0, 0, 0}}, {name = 0, data = {0, 0, 0, 0, 0, 0, 0, 0}}, {
          name = 0, data = {0, 0, 0, 0, 0, 0, 0, 0}}}, num_properties = 0}, 
    position_output = 0, edgeflag_output = 0, immediates = 0x0, varient = {
      0x0 <repeats 16 times>}, nr_varients = 0, last_varient = 0, 
---Type <return> to continue, or q <return> to quit---
    create_varient = 0x2aaaae7afc70 <draw_vs_create_varient_generic>, 
    prepare = 0x2aaaae7d4d50 <vs_llvm_prepare>, 
    run_linear = 0x2aaaae7d4d60 <vs_llvm_run_linear>, 
    delete = 0x2aaaae7d4e70 <vs_llvm_delete>}, variant_key_size = 20, 
  variants = {base = 0x0, next = 0x756748, prev = 0x756748}, 
  variants_created = 0, variants_cached = 0}

#28 0x00002aaaaad4fab5 in _vg_surface_paint (abstract_surface=0x752880, 
    op=<value optimized out>, source=<value optimized out>, clip=0x0)
    at cairo-vg-surface.c:1259
1259		vgDrawPath (fullext, VG_FILL_PATH);
(gdb) list
1254	
1255		fullext = vgCreatePath (VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
1256					1,0,0,0, VG_PATH_CAPABILITY_ALL);
1257		vgAppendPathData (fullext, sizeof(segs), segs, data);
1258	
1259		vgDrawPath (fullext, VG_FILL_PATH);
1260	
1261		vgDestroyPath (fullext);
1262	    }

(In reply to comment #2)
> I got a FPE a little further, this time in vgDrawPath. Still null pointers

Switching to llvm 2.8 solved that one. but then there is yet another bug in

#0  0x0000000200000003 in ?? ()
#1  0x00002aaaae839c26 in vs_llvm_delete (dvs=0x75b620)
    at draw/draw_vs_llvm.c:77
#2  0x00002aaaae7e7254 in llvmpipe_delete_vs_state (
    pipe=<value optimized out>, vs=0x757490) at lp_state_vs.c:105
#3  0x00002aaaafcf418c in util_destroy_blit (ctx=0x757160)
    at util/u_blit.c:173
#4  0x00002aaaafcc71a0 in vg_destroy_context (ctx=0x752cf0)
    at vg_context.c:171
#5  0x00002aaaadb44028 in destroy_context (drv=<value optimized out>, 
    dpy=0x671a80, draw=0x863930, read=0x863930, ctx=0x7a5a70)
    at common/egl_g3d_api.c:219
#6  egl_g3d_make_current (drv=<value optimized out>, dpy=0x671a80, 
    draw=0x863930, read=0x863930, ctx=0x7a5a70) at common/egl_g3d_api.c:556
#7  0x00002aaaabb674f9 in eglMakeCurrent (dpy=0x671a80, draw=0x863930, 
    read=0x863930, ctx=0x7a5a70) at eglapi.c:481
#8  0x000000000044b7f5 in _cairo_boilerplate_vg_create_surface_egl (
    name=<value optimized out>, content=CAIRO_CONTENT_COLOR_ALPHA, 
    width=<value optimized out>, height=<value optimized out>, 
    max_width=<value optimized out>, max_height=<value optimized out>, 
    mode=<value optimized out>, id=<value optimized out>, 
    closure=0x7fffffffc0a0) at cairo-boilerplate-vg.c:272


Looks like the cairo test might be a goldmine =) should I open another bug or change the bug title?

That would be great.  Can you also provide the instructions to run cairo tests with OpenVG backend, or even better, a simpler test case that demonstrate the issue(s).

The OpenVG state tracker has been removed from Mesa. Closing issue.