(gdb) bt full
#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:36
No locals.
#1  0x00007ffff0509f0a in u_upload_data (upload=0x41b4160, min_out_offset=0, size=162716, data=0x7fff89824490, out_offset=0xa53614c, outbuf=0xa536150) at util/u_upload_mgr.c:253
        ptr = 0x7fffbd6d1700 <error: Cannot access memory at address 0x7fffbd6d1700>
        ret = PIPE_OK
#2  0x00007ffff050cb77 in u_vbuf_upload_buffers (mgr=0xa535e00, start_vertex=0, num_vertices=2141, start_instance=0, num_instances=1) at util/u_vbuf.c:980
        end = 162716
        real_vb = 0xa536148
        err = 32767
        start = 0
        ptr = 0x7fff89824490 "\202\260\236@q\003\205\277\271G\235\277\243"
        i = 0
        nr_velems = 5
        velems = 0x7fff9da8b1b4
        start_offset = {0, 32767, 4031815301, 32767, 76728768, 0, 3941153816, 32767, 176079456, 0, 176079464, 0, 32, 0, 190931792, 0, 256, 0, 3694857312, 554752, 3941153824, 32767,
          4031815434, 32767, 3941153808, 32, 4032888356, 32767, 176079464, 0, 4031634306, 32767}
        end_offset = {162716, 0, 0, 0, 176079440, 0, 176074192, 0, 3941153872, 32767, 4031201701, 32767, 0, 0, 174756480, 0, 0, 1, 0, 0, 3941153904, 32767, 4031634306, 32767, 0, 0, 0, 0,
          3941153968, 32767, 173235712, 0}
        buffer_mask = 0
#3  0x00007ffff050d5c3 in u_vbuf_draw_vbo (mgr=0xa535e00, info=0x7fffeae93e00) at util/u_vbuf.c:1250
        pipe = 0xa7eadd0
        start_vertex = 0
        min_index = 0
        num_vertices = 2141
        unroll_indices = 0 '\000'
        used_vb_mask = 1
        user_vb_mask = 1
        incompatible_vb_mask = 0
        new_info = {indexed = 1 '\001', mode = 5, start = 0, count = 2140, start_instance = 0, instance_count = 1, index_bias = 0, min_index = 0, max_index = 2140,
          primitive_restart = 0 '\000', restart_index = 0, count_from_stream_output = 0x0, indirect = 0x0, indirect_offset = 245147056}
#4  0x00007ffff0477379 in cso_draw_vbo (cso=0xa6a8370, info=0x7fffeae93e00) at cso_cache/cso_context.c:1425
        vbuf = 0xa535e00
#5  0x00007ffff034acfc in st_draw_vbo (ctx=0xe9ca5b0, prims=0x7fffeae93f20, nr_prims=1, ib=0x7fffeae93f00, index_bounds_valid=1 '\001', min_index=0, max_index=2140, tfb_vertcount=0x0,
    indirect=0x0) at state_tracker/st_draw.c:285
        st = 0xa5a9230
        ibuffer = {index_size = 2, offset = 0, buffer = 0x0, user_buffer = 0x7fff8981dba0}
        info = {indexed = 1 '\001', mode = 5, start = 0, count = 2140, start_instance = 0, instance_count = 1, index_bias = 0, min_index = 0, max_index = 2140,
          primitive_restart = 0 '\000', restart_index = 0, count_from_stream_output = 0x0, indirect = 0x0, indirect_offset = 245147056}
        arrays = 0xe9f1650
---Type <return> to continue, or q <return> to quit---
        i = 0
#6  0x00007ffff03084eb in vbo_handle_primitive_restart (ctx=0xe9ca5b0, prim=0x7fffeae93f20, nr_prims=1, ib=0x7fffeae93f00, index_bounds_valid=1 '\001', min_index=0, max_index=2140)
    at vbo/vbo_exec_array.c:591
        vbo = 0xe9edf50
#7  0x00007ffff030900c in vbo_validated_drawrangeelements (ctx=0xe9ca5b0, mode=5, index_bounds_valid=1 '\001', start=0, end=2140, count=2140, type=5123, indices=0x7fff8981dba0,
    basevertex=0, numInstances=1, baseInstance=0) at vbo/vbo_exec_array.c:1014
        vbo = 0xe9edf50
        exec = 0xe9eeb98
        ib = {count = 2140, type = 5123, obj = 0x4215140, ptr = 0x7fff8981dba0}
        prim = {{mode = 5, indexed = 1, begin = 1, end = 1, weak = 0, no_current_update = 0, is_indirect = 0, pad = 0, start = 0, count = 2140, basevertex = 0, num_instances = 1,
            base_instance = 0, indirect_offset = 245147056}}
#8  0x00007ffff03091d1 in vbo_exec_DrawRangeElementsBaseVertex (mode=5, start=0, end=2140, count=2140, type=5123, indices=0x7fff8981dba0, basevertex=0) at vbo/vbo_exec_array.c:1122
        warnCount = 0
        index_bounds_valid = 1 '\001'
        max_element = 2000000000
        ctx = 0xe9ca5b0
#9  0x00007ffff0309216 in vbo_exec_DrawRangeElements (mode=5, start=0, end=2140, count=2140, type=5123, indices=0x7fff8981dba0) at vbo/vbo_exec_array.c:1142
                                                    #(GL_TRIANGLE_STRIP, 0, 0x85c, 0x85c, GL_UNSIGNED_SHORT, 0x0003000200010000)
No locals.
#10 0x0000000000feb79a in FMeshDrawingPolicy::DrawMesh(FMeshBatch const&, int) const ()
No symbol table info available.
#11 0x0000000000f3d968 in void FDrawTranslucentMeshAction::Process<FNoLightMapPolicy, FNoDensityPolicy>(FProcessBasePassMeshParameters const&, FNoLightMapPolicy const&, FNoLightMapPolicy::ElementDataType const&, FNoDensityPolicy::ElementDataType const&) const ()
No symbol table info available.
#12 0x0000000000f409d5 in void ProcessBasePassMesh_LightMapped<FDrawTranslucentMeshAction, FNoLightMapPolicy>(FProcessBasePassMeshParameters const&, FDrawTranslucentMeshAction const&, FNoLightMapPolicy const&, FNoLightMapPolicy::ElementDataType const&) ()
No symbol table info available.
#13 0x0000000000f40e33 in void ProcessBasePassMesh<FDrawTranslucentMeshAction>(FProcessBasePassMeshParameters const&, FDrawTranslucentMeshAction const&) ()
No symbol table info available.
#14 0x0000000000ebb276 in FTranslucencyDrawingPolicyFactory::DrawDynamicMesh(FViewInfo const&, FTranslucencyDrawingPolicyFactory::ContextType, FMeshBatch const&, unsigned int, unsigned int, FPrimitiveSceneInfo const*, FHitProxyId) ()
No symbol table info available.
#15 0x0000000000f99280 in TDynamicPrimitiveDrawer<FTranslucencyDrawingPolicyFactory>::DrawMesh(FMeshBatch const&) ()
No symbol table info available.
#16 0x000000000171cc57 in FDynamicTrailsEmitterData::Render(FParticleSystemSceneProxy*, FPrimitiveDrawInterface*, FSceneView const*, unsigned int) ()
No symbol table info available.
#17 0x000000000170253f in FParticleSystemSceneProxy::DrawDynamicElements(FPrimitiveDrawInterface*, FSceneView const*, unsigned int, unsigned int) ()
No symbol table info available.
#18 0x000000000131cb3b in FTranslucentPrimSet::Draw(FViewInfo const&, FSceneRenderer&, unsigned int, unsigned int) const ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#19 0x000000000131e71e in FSceneRenderer::RenderTranslucency(unsigned int) ()
No symbol table info available.
#20 0x0000000001237674 in FSceneRenderer::RenderDPGEnd(unsigned int, unsigned int, unsigned int&, unsigned int) ()
No symbol table info available.
#21 0x0000000001237934 in FSceneRenderer::Render() ()
No symbol table info available.
#22 0x00000000012379d4 in ?? ()
No symbol table info available.
#23 0x0000000001237a8d in ?? ()
No symbol table info available.
#24 0x00000000011ec6fe in RenderingThreadMain() ()
No symbol table info available.
#25 0x00000000011ed1c9 in FRenderingThread::Run() ()
No symbol table info available.
#26 0x0000000001cd512a in FRunnableThreadMac::Run() ()
No symbol table info available.
#27 0x0000000001cd5171 in FRunnableThreadMac::_ThreadProc(void*) ()
No symbol table info available.
#28 0x00007ffff7bc7073 in start_thread (arg=0x7fffeae95700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7fffeae95700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737134548736, -3376635683800400119, 1, 53703776, 19, 140737134548736, 3376594087614037769, 3376618646042787593},
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#29 0x00007ffff64c911d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
(gdb)