webpack/coffee-loader — pull request #7 by jgoz (2014-07-27 22:07:43+00:00)
Title: Normalize sourceRoot values to null

source-map>=0.1.35 will convert source paths to relative paths if sourceRoot is non-null (including the empty string). The coffee script compiler may return `sourceRoot` values that are the empty string, rather than null.

This gets webpack tests passing with source-map@0.1.35 and up and is a prerequisite for webpack/core#5.