D-Programming-Language/phobos — pull request #1164 by andralex (2013-02-24 23:52:01+00:00)
Title: Fix Issue 5359 - std.traits : isDelegate returns false on a delegate

http://d.puremagic.com/issues/show_bug.cgi?id=5359

I recall Kenji introduced the variadics. What was the intent here?