[Issue 15973] New: nextPow2 relies on processor specific behavior

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15973

          Issue ID: 15973
           Summary: nextPow2 relies on processor specific behavior
           Product: D
           Version: D2
          Hardware: x86
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: jack at jackstouffer.com

The integer version of nextPow2 uses >> on numbers that cause overflow. The
behavior of this operation is processor specific, so the function should just
return 0 if val == T.max/T.min

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