Created by: JinYue2015

• 版本、环境信息：    1）PaddlePaddle版本：1.2.0    2）python：3.5
  3）ai studio / win10

• 训练信息    1）单机 ps：我在本地运行和在ai studio单机上运行出现的错误是一样的。

• 复现信息：我修改了paddleCV/deeplabv3+/train.py 用作其他数据集的训练，但在定义

loss = loss(logit_ret,binary_label,instance_label)
lr = fluid.layers.polynomial_decay(base_lr, total_step, end_learning_rate = 0,power=0.9)
opt = fluid.optimizer.Momentum(lr,momentum=0.9,
                                regularization=fluid.regularizer.L2DecayRegularizer(
                                    regularization_coeff=weight_decay))
opt.minimize(loss)

opt.minimize(loss)这句话报错。

• 问题描述： 报错信息如下：

EnforceNotMet Traceback (most recent call last) in 122 regularization=fluid.regularizer.L2DecayRegularizer( 123 regularization_coeff=weight_decay)) --> 124 _,retv = opt.minimize(loss=loss,startup_program=sp,) 125 126 fluid.memory_optimize(

/opt/conda/envs/py35-paddle1.0.0/lib/python3.5/site-packages/paddle/fluid/optimizer.py in minimize(self, loss, startup_program, parameter_list, no_grad_set) 253 """ 254 params_grads = append_backward(loss, parameter_list, no_grad_set, --> 255 [error_clip_callback]) 256 257 params_grads = sorted(params_grads, key=lambda x: x[0].name)

/opt/conda/envs/py35-paddle1.0.0/lib/python3.5/site-packages/paddle/fluid/backward.py in append_backward(loss, parameter_list, no_grad_set, callbacks) 588 rename_grad(root_block, fwd_op_num, grad_to_var, {}) 589 --> 590 append_backward_vars(root_block, fwd_op_num, grad_to_var, grad_info_map) 591 592 program.current_block_idx = current_block_idx

/opt/conda/envs/py35-paddle1.0.0/lib/python3.5/site-packages/paddle/fluid/backward.py in append_backward_vars(block, start_op_idx, grad_to_var, grad_info_map) 424 # infer_shape and infer_type 425 op_desc.infer_var_type(block.desc) --> 426 op_desc.infer_shape(block.desc) 427 # ncclInit dones't need to set data_type 428 if op_desc.type() == 'ncclInit':

EnforceNotMet: The input of cast op must be set at [/paddle/paddle/fluid/operators/cast_op.cc:42] PaddlePaddle Call Stacks: 0 0x7f1bf9e45426p paddle::platform::EnforceNotMet::EnforceNotMet(std::__exception_ptr::exception_ptr, char const*, int) + 486 1 0x7f1bfa5ecb16p paddle::operators::CastOpInferShape::operator()(paddle::framework::InferShapeContext*) const + 566 2 0x7f1bfa5ecd63p std::_Function_handler<void (paddle::framework::InferShapeContext*), paddle::framework::details::OpInfoFiller<paddle::operators::CastOpInferShape, (paddle::framework::details::OpInfoFillType)4>::operator()(char const*, paddle::framework::OpInfo*) const::{lambda(paddle::framework::InferShapeContext*)#1 (closed)}>::_M_invoke(std::_Any_data const&, paddle::framework::InferShapeContext*) + 35 3 0x7f1bf9eedd86p paddle::framework::OpDesc::InferShape(paddle::framework::BlockDesc const&) const + 902 4 0x7f1bf9e9a755p void pybind11::cpp_function::initialize<pybind11::cpp_function::initialize<void, paddle::framework::OpDesc, paddle::framework::BlockDesc const&, pybind11::name, pybind11::is_method, pybind11::sibling>(void (paddle::framework::OpDesc::)(paddle::framework::BlockDesc const&) const, pybind11::name const&, pybind11::is_method const&, pybind11::sibling const&)::{lambda(paddle::framework::OpDesc const, paddle::framework::BlockDesc const&)#1 (closed)}, void, paddle::framework::OpDesc const*, paddle::framework::BlockDesc const&, pybind11::name, pybind11::is_method, pybind11::sibling>(pybind11::cpp_function::initialize<void, paddle::framework::OpDesc, paddle::framework::BlockDesc const&, pybind11::name, pybind11::is_method, pybind11::sibling>(void (paddle::framework::OpDesc::)(paddle::framework::BlockDesc const&) const, pybind11::name const&, pybind11::is_method const&, pybind11::sibling const&)::{lambda(paddle::framework::OpDesc const, paddle::framework::BlockDesc const&)#1 (closed)}&&, void ()(paddle::framework::OpDesc const, paddle::framework::BlockDesc const&), 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