lua/5.2/hdf5/ffi.lua:56: expected 'static const int' on line 208 |

[nicolasH]

Hello

I am trying to use neuraltalk2 which depends on torch and on this project, and when I try to run
require('hdf5') in the torch interpreter, I run into the error bellow. I have followed the various install procedures on OSX and Ubuntu 14.04 and end up with the same error.

I lack any lua experience, so I do not see where to go from here. I believe I have the latest version of the hdf5 library:

"Warning: homebrew/science/hdf5-1.8.16 already installed"

Here is the error, followed by a list of the version of the various packages installed.

th> require('hdf5')
.../lua-extra/torch/install/share/lua/5.2/trepl/init.lua:383: .../lua-extra/torch/install/share/lua/5.2/hdf5/ffi.lua:56: expected 'static const int' on line 208
stack traceback:
.../lua-extra/torch/install/share/lua/5.2/trepl/init.lua:500: in function <.../lua-extra/torch/install/share/lua/5.2/trepl/init.lua:493>
[C]: in function 'error'
.../lua-extra/torch/install/share/lua/5.2/trepl/init.lua:383: in function 'require'
[string "_RESULT={require('hdf5')}"]:1: in main chunk
[C]: in function 'xpcall'
.../lua-extra/torch/install/share/lua/5.2/trepl/init.lua:650: in function 'repl'
...xtra/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:199: in main chunk
[C]: in ?

I have h5py (2.5.0) (python 2.7)

~ lua -v
Lua 5.2.3 Copyright (C) 1994-2013 Lua.org, PUC-Rio

~ luarocks list

Installed rocks:

argcheck
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

cwrap
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

dok
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

env
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

fftw3
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

gnuplot
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

graph
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

graphicsmagick
1.scm-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

hdf5
0-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

image
1.1.alpha-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

itorch
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

lbase64
20120807-3 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

lua-cjson
2.1.0-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

luabitop
1.0.2-2 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

luacrypto
0.3.2-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

luaffi
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

luafilesystem
1.6.3-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

lzmq
0.4.3-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

nn
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

nngraph
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

nnx
0.1-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

optim
1.0.5-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

paths
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

penlight
1.3.2-2 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

signal
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

sundown
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

sys
1.1-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

threads
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

torch
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

totem
0-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

trepl
scm-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

uuid
0.2-1 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

xlua
1.0-0 (installed) - /Users/niko/workspace/lua-extra/torch/install/lib/luarocks/rocks

Any idea where to go from here to fix that error?

Thanks a lot,

Nicolas

[d11]

Hi, torch-hdf5 (and torch generally) requires LuaJIT (for its FFI features) rather than the PUC-Rio Lua, which it looks like you're running here. You probably want to be running the interpreter with 'th', as detailed here: http://torch.ch/docs/getting-started.html. It won't work with 'lua'.

[soumith]

this is a luaffifb bug, where you can use ffi with vanilla lua. We'll isolate and fix the bug in the next couple of days.

[d11]

Ahh, I see! Thanks for the info.