http://d.puremagic.com/issues/show_bug.cgi?id=794
           Summary: std.math.exp2(0) equals 0 instead of 1
           Product: D
           Version: 1.00
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: Phobos
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: Robert at christina-fritsch.de
--