text: Title: On Installation process, "segmentation fault (core dumped)"
  Body: Hi, thanks for a great work!
  
  I am trying to git clone the project and try inference using the source code.
  However, when I try this command:
  "python basicsr/setup.py develop"
  it keeps making "segmentation fault (core dumped)" error.
  My environment is Ubuntu 18.04.6
  When I tried the process in the colab, it does work.
  Can you check if everything is correct on your installation process or description?
  Were there any changes in "basicsr/setup.py" file?
  Thank you
  