Segmentation fault (core dumped) when read h5 file in multi thread

[danieljf24]

I would like to use multi-thread to read h5 file like the way of reading image in the project. When I replace https://github.com/soumith/dcgan.torch/blob/master/data/data.lua#L31 with function() require 'torch' require 'hdf5' end, Segmentation fault (core dumped) appeared.
I don't know how to fix it, any help will be appreciated.