[Bug math/16562] New: spurious overflow exception from yn

["zimmerma+gcc at loria dot fr" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16562

            Bug ID: 16562
           Summary: spurious overflow exception from yn
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: zimmerma+gcc at loria dot fr

on x86_64 I get (double precision, y42 is yn for n=42):

Testing function y42 for exponent 3 [seed=14309].
 rounding mode MPFR_RNDZ:
      wrong overflow flag for x=4.0000000000000@-269
      library gives -f.ffffffffffff0@255
      mpfr    gives -f.ffffffffffff8@255
      overflow: mpfr 2, library 8

Note the glibc result is *not* -DBL_MAX, thus no overflow exception should be
raised.

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