Broken when used with Ember 2.14

[rondale-sc]

I believe this addon relies on vendor/ember/ember.debug.map being present.

There is an outstanding issue here emberjs/ember.js#15464 that I believe is related. I'm not sure of a workaround atm, but thought this might be a good place to add insight into implications of sourcemaps not being available.

[simonihmig]

@rondale-sc not sure if that is really tied to the ember sourcemap issue. The warning is not part of the stack trace, and the trace contains something about ember-css-modules...

Also the issue should probably go to either the https://github.com/broccolijs/broccoli-concat repo or ember-css-modules, so closing this here.

Btw, just created a PR that should hopefully fix the Ember sourcemap issue here, in case this is related: emberjs/ember.js#15577