#0  0x00007fff867fa2e0 in ?? ()
#1  0x00007fffd91d8c07 in std::function<void ()>::function(std::function<void ()> const&) ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#2  0x00007fffdb865d47 in tensorflow::EventMgr::FreeMemory(tensorflow::gtl::InlinedVector<tensorflow::EventMgr::InUse, 4> const&) () from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#3  0x00007fffdbb0bd09 in tensorflow::EventMgr::PollLoop() ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#4  0x00007fffdbb0b6ad in tensorflow::EventMgr::StartPollingLoop()::{lambda()#1}::operator()() const ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#5  0x00007fffdbb0c29b in std::_Function_handler<void (), tensorflow::EventMgr::StartPollingLoop()::{lambda()#1}>::_M_invoke(std::_Any_data const&) ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#6  0x00007fffd918f2d8 in std::function<void ()>::operator()() const ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#7  0x00007fffdbff2b0f in tensorflow::thread::EigenEnvironment::ExecuteTask(tensorflow::thread::EigenEnvironment::Task const&) () from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#8  0x00007fffdbff56d2 in Eigen::NonBlockingThreadPoolTempl<tensorflow::thread::EigenEnvironment>::WorkerLoop(int) ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#9  0x00007fffdbff3d38 in Eigen::NonBlockingThreadPoolTempl<tensorflow::thread::EigenEnvironment>::NonBlockingThreadPoolTempl(int, bool, tensorflow::thread::EigenEnvironment)::{lambda()#1}::operator()() const ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#10 0x00007fffdbff6054 in std::_Function_handler<void (), Eigen::NonBlockingThreadPoolTempl<tensorflow::thread::EigenEnvironment>::NonBlockingThreadPoolTempl(int, bool, tensorflow::thread::EigenEnvironment)::{lambda()#1}>::_M_invoke(std::_Any_data const&) () from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#11 0x00007fffd918f2d8 in std::function<void ()>::operator()() const ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#12 0x00007fffdbff281d in tensorflow::thread::EigenEnvironment::CreateThread(std::function<void ()>)::{lambda()#1}::operator()() const () from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#13 0x00007fffdbff3aee in std::_Function_handler<void (), tensorflow::thread::EigenEnvironment::CreateThread(std::function<void ()>)::{lambda()#1}>::_M_invoke(std::_Any_data const&) ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#14 0x00007fffd918f2d8 in std::function<void ()>::operator()() const ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#15 0x00007fffdc02a54a in void std::_Bind_simple<std::function<void ()> ()>::_M_invoke<>(std::_Index_tuple<>) ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#16 0x00007fffdc02a4e7 in std::_Bind_simple<std::function<void ()> ()>::operator()() ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#17 0x00007fffdc02a486 in std::thread::_Impl<std::_Bind_simple<std::function<void ()> ()> >::_M_run() ()
   from /home/ubuntu/env3/lib/python3.5/site-packages/tensorflow/python/_pywrap_tensorflow.so
#18 0x00007fffd5a3bc80 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#19 0x00007ffff7bc16ba in start_thread (arg=0x7fff9ffff700) at pthread_create.c:333
#20 0x00007ffff78f782d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109