https://issues.dlang.org/show_bug.cgi?id=14084

          Issue ID: 14084
           Summary: cartesianProduct length is not defined
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Phobos
          Assignee: nobody@puremagic.com
          Reporter: ilyayaroshenko@gmail.com

--