It seems the patch for PR fortran/83633 cured
PR fortran/64107.  I've added the code from
this PR to the test suite to ensure that it
doesn't get broken.  Patche attached.

2018-03-06  Steven G. Kargl  <kargl@gcc.gnu.org>

        PR fortran/64107
        * gfortran.dg/pr64107.f90: New test.

-- 
Steve