include-path not working since v4.8.0

[vhkrausser]

We are working with node-sass using it in package.json as "^4.5.3". On new installations we notice that the build process wasn't able to find one file anymore. This file is imported and found in a folder that we pass as --include-path to the compilation process (through webpack's sass-loader).

After some research I noticed that the --include-path option works until version 4.7.2. And from 4.8.0 it returns that is unable to find the imported file.

I've created a repository https://github.com/vhkrausser/node-sass-test that has the minimum structure to reproduce the problem and instructions

I'm posting this here but I couldn't be sure if the problem is at node-sass or libsass. Sorry if I'm at the wrong place.

• NPM version (npm -v): 5.6.0
• Node version (node -v): v8.9.4
• Node Process (node -p process.versions):{ http_parser: '2.7.0',
  node: '8.9.4',
  v8: '6.1.534.50',
  uv: '1.15.0',
  zlib: '1.2.11',
  ares: '1.10.1-DEV',
  modules: '57',
  nghttp2: '1.25.0',
  openssl: '1.0.2n',
  icu: '59.1',
  unicode: '9.0',
  cldr: '31.0.1',
  tz: '2017b' }
• Node Platform (node -p process.platform): win32
• Node architecture (node -p process.arch):x64
• node-sass version (node -p "require('node-sass').info"):
  node-sass 4.8.2 (Wrapper) [JavaScript]
  libsass 3.5.1 (Sass Compiler) [C/C++]
• npm node-sass versions (npm ls node-sass): [email protected]

[xzyfer]

We have identified the issue in LibSass sass/libsass#2588.

The work around for now is to not use ./ or ../ in include paths.