.
Thread 3 (Thread 0x7fce32e34700 (LWP 25138)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:39
No locals.
#1  0x00007fce4014166a in epoll_wait ()
No symbol table info available.
#2  0x00007fce40141101 in epoll_dispatch ()
No symbol table info available.
#3  0x00007fce4013f1c5 in event_base_loop ()
No symbol table info available.
#4  0x00007fce400e824d in base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) ()
No symbol table info available.
#5  0x00007fce40108180 in MessageLoop::Run() ()
No symbol table info available.
#6  0x00007fce4012c9ac in base::Thread::ThreadMain() ()
No symbol table info available.
#7  0x00007fce4012c792 in base::(anonymous namespace)::ThreadFunc(void*) ()
No symbol table info available.
#8  0x00007fce3b841e9a in start_thread (arg=0x7fce32e34700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fce32e34700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7928496610822268550, 140733233471392, 140523593746880, 0, 3, -7954543936107501946, -7954523931154372986}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00007fce3969a77d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#10 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7fce32633700 (LWP 25139)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
No locals.
#1  0x00007fce40128b0f in base::ConditionVariable::TimedWait(base::TimeDelta const&) ()
No symbol table info available.
#2  0x00007fce4012937f in base::WaitableEvent::TimedWait(base::TimeDelta const&) ()
No symbol table info available.
#3  0x00007fce4010d95b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) ()
No symbol table info available.
#4  0x00007fce40108180 in MessageLoop::Run() ()
No symbol table info available.
#5  0x00007fce4012c9ac in base::Thread::ThreadMain() ()
No symbol table info available.
#6  0x00007fce4012c792 in base::(anonymous namespace)::ThreadFunc(void*) ()
No symbol table info available.
#7  0x00007fce3b841e9a in start_thread (arg=0x7fce32633700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fce32633700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7928496610822268550, 140733233469696, 140523585354176, 0, 3, -7954542837132745082, -7954523931154372986}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007fce3969a77d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7fce3f368980 (LWP 25137)):
#0  brw_update_renderbuffer_surface (brw=0x7fce4584e030, rb=0x7fce44a318c0, unit=0) at brw_wm_surface_state.c:905
        intel = 0x7fce4584e030
        ctx = 0x7fce4584e030
        irb = 0x7fce44a318c0
        mt = <optimized out>
        region = <optimized out>
        surf = <optimized out>
        tile_x = <optimized out>
        tile_y = <optimized out>
        format = <optimized out>
        __FUNCTION__ = "brw_update_renderbuffer_surface"
#1  0x00007fce33a5b2d0 in brw_update_renderbuffer_surfaces (brw=0x7fce4584e030) at brw_wm_surface_state.c:1002
        intel = 0x7fce4584e030
        ctx = 0x7fce4584e030
        i = <optimized out>
#2  0x00007fce33a44e48 in brw_upload_state (brw=0x7fce4584e030) at brw_state_upload.c:504
        atom = <optimized out>
        ctx = 0x7fce4584e030
        intel = 0x7fce4584e030
        state = 0x7fce4586dbe4
        i = <optimized out>
        dirty_count = 0
#3  0x00007fce33a3203f in brw_try_draw_prims (max_index=<optimized out>, min_index=<optimized out>, ib=0x7fff026395a0, nr_prims=1, prim=0x7fff026395c0, arrays=0x7fce457655a8, ctx=0x7fce4584e030) at brw_draw.c:521
        estimated_max_prim_size = 4096
        retval = <optimized out>
        i = <optimized out>
        fail_next = false
#4  brw_draw_prims (ctx=0x7fce4584e030, arrays=0x7fce457655a8, prim=0x7fff026395c0, nr_prims=1, ib=0x7fff026395a0, index_bounds_valid=<optimized out>, min_index=4294967295, max_index=4294967295, tfb_vertcount=0x0) at brw_draw.c:605
        retval = true
#5  0x00007fce3369e9a7 in vbo_validated_drawrangeelements (ctx=0x7fce4584e030, mode=4, index_bounds_valid=0 '\000', start=4294967295, end=4294967295, count=6, type=5123, indices=0x0, basevertex=0, numInstances=1) at vbo/vbo_exec_array.c:809
        vbo = 0x7fce45762000
        exec = 0x7fce45762dd0
        ib = {count = 6, type = 5123, obj = 0x7fce44a839a0, ptr = 0x0}
        prim = {{mode = 4, indexed = 1, begin = 1, end = 1, weak = 0, no_current_update = 0, pad = 0, start = 0, count = 6, basevertex = 0, num_instances = 1}}
#6  0x00007fce3369ecf6 in vbo_exec_DrawElements (mode=4, count=6, type=5123, indices=0x0) at vbo/vbo_exec_array.c:966
        ctx = 0x7fce4584e030
#7  0x00007fce4135461d in gpu::gles2::GLES2DecoderImpl::HandleDrawElements(unsigned int, gpu::gles2::DrawElements const&) ()
No symbol table info available.
#8  0x00007fce41357dff in gpu::gles2::GLES2DecoderImpl::DoCommand(unsigned int, unsigned int, void const*) ()
No symbol table info available.
#9  0x00007fce4136953d in gpu::CommandParser::ProcessCommand() ()
No symbol table info available.
#10 0x00007fce4135aa76 in gpu::GpuScheduler::PutChanged() ()
No symbol table info available.
#11 0x00007fce41338504 in gpu::CommandBufferService::Flush(int) ()
No symbol table info available.
#12 0x00007fce407df14c in GpuCommandBufferStub::OnAsyncFlush(int, unsigned int) ()
No symbol table info available.
#13 0x00007fce407deadb in GpuCommandBufferMsg_AsyncFlush::Dispatch<GpuCommandBufferStub, GpuCommandBufferStub, void (GpuCommandBufferStub::*)(int, unsigned int)> ()
No symbol table info available.
#14 0x00007fce407e0303 in GpuCommandBufferStub::OnMessageReceived(IPC::Message const&) ()
No symbol table info available.
#15 0x00007fce407be003 in MessageRouter::RouteMessage(IPC::Message const&) ()
No symbol table info available.
#16 0x00007fce407dba2b in GpuChannel::HandleMessage() ()
No symbol table info available.
#17 0x00007fce4012bf8e in base::subtle::TaskClosureAdapter::Run() ()
No symbol table info available.
#18 0x00007fce4010852a in MessageLoop::RunTask(MessageLoop::PendingTask const&) ()
No symbol table info available.
#19 0x00007fce4010bedb in MessageLoop::DeferOrRunPendingTask(MessageLoop::PendingTask const&) ()
No symbol table info available.
#20 0x00007fce4010c48f in MessageLoop::DoWork() ()
No symbol table info available.
#21 0x00007fce40132f69 in base::MessagePumpGlib::HandleDispatch() ()
No symbol table info available.
#22 0x00007fce40132fad in (anonymous namespace)::WorkSourceDispatch(_GSource*, int (*)(void*), void*) ()
No symbol table info available.
#23 0x00007fce3dd24bca in g_main_dispatch (context=0x7fce44a83580) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:2510
        dispatch = 0x7fce40132fa0 <(anonymous namespace)::WorkSourceDispatch(_GSource*, int (*)(void*), void*)>
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
        current_source_link = {data = 0x7fce44a304d0, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7fce44a304d0
        current = 0x7fce44a33e40
        i = <optimized out>
#24 g_main_context_dispatch (context=0x7fce44a83580) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3047
No locals.
#25 0x00007fce3dd24f90 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7fce44a83580, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3118
        timeout = 0
        some_ready = 1
        fds = <optimized out>
        max_priority = 2147483647
        nfds = 2
        allocated_nfds = <optimized out>
#26 g_main_context_iterate (context=0x7fce44a83580, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3055
        some_ready = 1
#27 0x00007fce3dd25054 in g_main_context_iteration (context=0x7fce44a83580, may_block=0) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3179
        retval = <optimized out>
#28 0x00007fce401333af in base::MessagePumpGtk::RunOnce(_GMainContext*, bool) ()
No symbol table info available.
#29 0x00007fce40132b63 in base::MessagePumpGlib::RunWithDispatcher(base::MessagePump::Delegate*, base::MessagePumpDispatcher*) ()
No symbol table info available.
#30 0x00007fce40108180 in MessageLoop::Run() ()
No symbol table info available.
#31 0x00007fce40095636 in GpuMain(MainFunctionParams const&) ()
No symbol table info available.
#32 0x00007fce400950b2 in content::ContentMain(int, char const**, content::ContentMainDelegate*) ()
No symbol table info available.
#33 0x00007fce3f8d10d8 in ChromeMain ()
No symbol table info available.
#34 0x00007fce3f8ccca6 in main ()
No symbol table info available.