Created by: XiaoheYou

   1）PaddlePaddle版本：1.4.1    2）GPU：P4    3）系统环境：centos6    4）单卡

• 问题描述：fluid.io.save_vars 报错： [ERROR 12-17 09:24:35.453 mask_rcnn_workflow_local.py:164] Getting 'tensor_desc' is not supported by the type of var _generated_var_0. at [/paddle/paddle/fluid/framework/var_desc.cc:207] PaddlePaddle Call Stacks: 0 0x7f315d4e0ff8p void paddle::platform::EnforceNotMet::Initstd::string(std::string, char const*, int) + 360 1 0x7f315d64f799p paddle::framework::VarDesc::tensor_desc() const + 521 2 0x7f315d64fa6cp paddle::framework::VarDesc::GetShape() const + 28 3 0x7f315d58c0f5p 4 0x7f315d513936p 5 0x4c5326p PyEval_EvalFrameEx + 37958 6 0x4b9b66p PyEval_EvalCodeEx + 774 7 0x4d5669p 8 0x4a5471p PyObject_CallFunction + 497 9 0x41ce79p _PyObject_GenericGetAttrWithDict + 1321 10 0x4bc2f8p PyEval_EvalFrameEx + 1048 11 0x4b9b66p PyEval_EvalCodeEx + 774 12 0x4c1f56p PyEval_EvalFrameEx + 24694 13 0x4b9b66p PyEval_EvalCodeEx + 774 14 0x4c17c6p PyEval_EvalFrameEx + 22758 15 0x4b9b66p PyEval_EvalCodeEx + 774 16 0x4c17c6p PyEval_EvalFrameEx + 22758 17 0x4c141fp PyEval_EvalFrameEx + 21823 18 0x4c141fp PyEval_EvalFrameEx + 21823 19 0x4c141fp PyEval_EvalFrameEx + 21823 20 0x4c141fp PyEval_EvalFrameEx + 21823 21 0x4b9b66p PyEval_EvalCodeEx + 774 22 0x4eb69fp 23 0x4e58f2p PyRun_FileExFlags + 130 24 0x4e41a6p PyRun_SimpleFileExFlags + 390 25 0x4938cep Py_Main + 1358 26 0x7f3215fc0830p __libc_start_main + 240 27 0x493299p _start + 41