https://issues.dlang.org/show_bug.cgi?id=20043

          Issue ID: 20043
           Summary: Tuple.rename doesn't work with const
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: default_357-line@yahoo.de

PR in progress

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