https://issues.dlang.org/show_bug.cgi?id=16308

          Issue ID: 16308
           Summary: [ndslice] should always has save primitive
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: ilyayaroshenko@gmail.com

The reason is that Slice never calls front/popFront and others primitives of underlaying range.

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