rubinius/rubinius — pull request #2635 by razielgn (2013-10-04 16:12:26+00:00)
Title: Store missing file path when raising a LoadError object

This is a 2.0 feature.
Not sure setting the instance variable directly is a good move, but I don't know if you want to add a RBX only method to LoadError to set the path, or adding a second optional parameter to the constructor. If you do I'm very happy to change it to something more "OO".