D-Programming-Language/phobos — pull request #704 by ibuclaw (2012-07-19 11:59:07+00:00)
Title: Fix cstream.printf() on x86_64.

http://d.puremagic.com/issues/show_bug.cgi?id=8191

Pretty certain this should fix that issue, and possibly any others involving x86_64 and std.stream / cstreams.