source-map resource urls coming out strange

[DBosley]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
Using postcss-loader (only using autoprefixer plugin, no extra configurations) combined with sass-loader, css-loader, and style-loader causes the resource URL for sourcemaps to be strange:

example: http://imgur.com/a/R73hV
scss loader config

{
          test: /\.scss$/,
          use: [{
              loader: 'style-loader',
              options: {
                sourceMap: true,
              }
            },
            {
              loader: 'css-loader',
              options: {
                sourceMap: true,
              }
            },
            {
              loader: 'postcss-loader',
              options: {
                sourceMap: true,
                //parser: require('postcss-scss'),
              }
            },
            {
              loader: 'sass-loader',
              options: {
                includePaths: [
                  './src/styles/bootstrap',
                  './src/styles/partials'
                ],
                sourceMap: true,
              }
            },
          ],
          include: [helpers.root('src', 'styles')]
        }

What is the expected behavior?
relative urls for sourcemaps, or at least only one absolute url

Please mention other relevant information such as your webpack version, Node.js version and Operating System.
webpack: 2.5.1
node: 6.10.3
windows 10

[DBosley]

This issue seems to affect multiple loaders. Posted the same issue on all affected loaders:
webpack-contrib/css-loader#529
#451
webpack-contrib/style-loader#231
webpack-contrib/postcss-loader#224

[alexander-akait]

@DBosley close this issue, seems duplicate #425, also WIP.