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System information

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-OS Platform (eg.Mac OS 10.14)
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Note: You can get most of the information by running summary_env.py.

To Reproduce

Steps to reproduce the behavior

Describe your current behavior
Code to reproduce the issue
Other info / logs

复现，人像分割模型，出现以下错误

File "train.py", line 169, in
train(args)
File "train.py", line 164, in train
use_vdl=args.use_vdl)
File "/home/ck/slu/koutu666/HumanSeg/models/humanseg.py", line 919, in train
quant=quant)
File "/home/ck/slu/koutu666/HumanSeg/models/humanseg.py", line 423, in train
regularization_coeff=regularization_coeff)
File "/home/ck/slu/koutu666/HumanSeg/models/humanseg.py", line 392, in default_optimizer
regularization_coeff=regularization_coeff))
File "/home/ck/.local/lib/python3.7/site-packages/paddle/fluid/optimizer.py", line 1135, ininit
name=name)
File "", line 2, ininit
File "/home/ck/.local/lib/python3.7/site-packages/paddle/fluid/dygraph/base.py", line 257, inimpl
return func(args,kwargs)
File "/home/ck/.local/lib/python3.7/site-packages/paddle/fluid/optimizer.py", line 84, ininit*
"parameter_list argument given to the Optimizer should not be None in dygraph mode."
AttributeError: parameter_list argument given to the Optimizer should not be None in dygraph mode.
(pt12) ck@lj:~/slu/koutu666/HumanSeg$