D-Programming-Language/dmd — pull request #1068 by 9rnsr (2012-07-28 15:50:11+00:00)
Title: Issue 8434 - [2.060 beta] cannot implicitly convert expression (vs1.opCast()) of type const(Vector2D) to object.Object

http://d.puremagic.com/issues/show_bug.cgi?id=8434

This is a regression of 2.058, by fixing issue 4088.
The equality comparison of class objects should not run opCast.