D-Programming-Language/phobos — pull request #408 by yebblies (2012-01-28 04:19:28+00:00)
Title: Remove implicit casts to mutable super class

The fix for [issue 3731](https://github.com/D-Programming-Language/dmd/pull/125) shows a couple of places in phobos that rely on this bug. std.xml is going away, so work around the issue for now (all problems are caused by opEquals and opCmp not being const correct) and in std.datetime, AA values must be rebindable.