[Issue 18727] New: std.math.fmin does not handle nan correctly

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18727

          Issue ID: 18727
           Summary: std.math.fmin does not handle nan correctly
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: jack at jackstouffer.com

assert(fmin(2.0, real.nan) is real.nan);

According to the C spec

"If one of the two arguments is NaN, the value of the other argument is
returned. Only if both arguments are NaN, NaN is returned."

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