I'm submitting a bug report

Webpack Version:
Tested with 2.x and 3.0.0

Babel Core Version:
6.25.0

Babel Loader Version:
7.1.0

Please tell us about your environment:
OSX 10.x

Current behavior:

If I look at the values passed to output.devtoolModuleFilename for files parsed through babel-loader have a non-relative and non-absolute value. Basically the values for resource, resourcePath and absoluteResourcePath are all the same.

Specifically if I have a file at ./src/main.js I will get

resource: src/main.js
resourcePath: src/main.js
absoluteResourcePath: src/main.js

Expected/desired behavior:

Files that are not passed through babel-loader have the following information:

resource: src/main.js
resourcePath: ./src/main.js
absoluteResourcePath: /Usrs/someone/dev/project/src/main.js

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem along with a gist/jsbin of your webpack configuration.

Using babel-loader you can debug this by setting output.devtoolModuleFilename to a console logging function and viewing the results.