Bug#727208: libmath-mpfr-perl: t/test4.t fails against libmpfr-dev >= 3.1.2

[Colin Watson]

Package: libmath-mpfr-perl
Version: 3.17-1
Severity: serious
User: ubuntu-devel at lists.ubuntu.com
Usertags: origin-ubuntu trusty

libmath-mpfr-perl fails to build due to a test failure when built
against libmpfr-dev >= 3.1.2:

  Got:      10111101111110100101110101101111011111101001011111011011110110110010010111110110111101111110100100110101
  Expected: 10111101111110100101110101101111011111101001011101011011110110110010010111010110111101111110100100110101
  t/test4.t .................
  Failed 1/49 subtests

This looks rather like this entry from the upstream changelog for 3.18
(https://metacpan.org/release/Math-MPFR):

  Depending upon the rounding mode values, the mpfr library may
  incorrectly return false for mpfr_fits_u*_p(x) for -1.0 < x < 0.0 or
  for -0.5 < x <0.0.  (This should be fixed in versions of mpfr later
  than 3.1.2.)  Have the Rmpfr_fits_u*_p() functions return correct
  result irrespective of the version of mpfr being used - and have the
  Math:MPFR test suite test for this.

Even if I'm wrong about the exact changelog entry, though, 3.18 builds
cleanly, so it's probably best to upgrade.

Thanks,

-- 
Colin Watson                                       [cjwatson at ubuntu.com]