class nn.Decorator has been already assigned a parent class

[bharathsekar]

I cloned torch, followed by

luarocks install torch
luarocks install nn
luarocks install cutorch
luarocks install cunn
luarocks install torchx
luarocks install dpnn

However the below command (require 'dpnn') results in an error
th> require 'dpnn'

<torch-dir>/install/share/lua/5.1/trepl/init.lua:389: <torch-dir>/install/share/lua/5.1/trepl/init.lua:389: <torch-dir>/install/share/lua/5.1/torch/init.lua:102: class nn.Constant has been already assigned a parent class

stack traceback:
[C]: in function 'error'
<torch-dir>/install/share/lua/5.1/trepl/init.lua:389: in function 'require'
[string "_RESULT={require 'dpnn'}"]:1: in main chunk
[C]: in function 'xpcall'
<torch-dir>/install/share/lua/5.1/trepl/init.lua:661: in function 'repl'
...rath/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:204: in main chunk
[C]: at 0x004064f0

note: <torch-dir> is the torch home directory

[Kaixhin]

Duplicate of #91. From that issue, one solution is to install a previous version:

git clone https://github.com/Element-Research/dpnn.git && \
  cd dpnn && \
  git reset --hard ca0e99fa6d0dfd971f0f284520562765ae0865fd && \
  luarocks make rocks/dpnn-scm-1.rockspec

[idansc]

latest nn and dpnn version works now