Unity-Technologies/mono — pull request #139 by richard-fine (2014-07-04 18:16:54+00:00)
Title: Fix System.Object method invocation on value types to be constrained

This fixes the IL generation around System.Object calls via 'this' and 'base' references in value types, which previously fell through the middle (didn't box but didn't constrain either), generating invalid IL and choking IL2CPP. Now both cases are correctly generated as constrained virtual calls, as per MSDN recommendation.