mxnet.base.MXNetError: mutex lock failed: Invalid argument

mxnet.base.MXNetError: [16:59:51] /Users/travis/build/dmlc/mxnet-distro/mxnet-build/3rdparty/tvm/nnvm/include/nnvm/graph.h:263: Check failed: it != attrs.end(): Cannot find attribute shape in the graph
Stack trace:
[bt] (0) 1 libmxnet.so 0x0000001c19046929 mxnet::op::NDArrayOpProp::~NDArrayOpProp() + 4473
[bt] (1) 2 libmxnet.so 0x0000001c19045d19 mxnet::op::NDArrayOpProp::~NDArrayOpProp() + 1385
[bt] (2) 3 libmxnet.so 0x0000001c1a55df53 mxnet::exec::GraphExecutor::Backward(std::__1::vector > const&, bool) + 4275
[bt] (3) 4 libmxnet.so 0x0000001c1a55b30c std::__1::unordered_map, std::__1::allocator >, mxnet::NDArray, std::__1::hash, std::__1::allocator > >, std::__1::equal_to, std::__1::allocator > >, std::__1::allocator, std::__1::allocator > const, mxnet::NDArray> > >::~unordered_map() + 1724
[bt] (4) 5 libmxnet.so 0x0000001c1a4f256e MXExecutorForward + 46
[bt] (5) 6 libffi.6.dylib 0x0000000102420884 ffi_call_unix64 + 76
[bt] (6) 7 ??? 0x00007000028506e0 0x0 + 123145344583392