Errors reporting on incorrect line # in Chromium with Grunt Browserify Sourcemap

[hdon]

( Originally reported here: gruntjs/grunt#1379 )

You can reproduce the bug with

git clone git@gist.github.com:f6f00c4595aa2e929411.git 
cd f6f00c4595aa2e929411
npm install
grunt

Then view index.html

It is not a bug with browserify I believe because using the following command to generate out.js does not reproduce the bug:

browserify -o out.js -e ./source -d