gcc/testsuite/gfortran.dg/read_float_1.f90

   1 ! { dg-do run }
   2 ! PR18218
   3 ! The IO library has an algorithm that involved repeated multiplication by 10,
   4 ! resulting in introducing large cumulative floating point errors.
   5 program foo
   6   character*20 s
   7   real*8 d
   8   s = "-.18774312893273    "
   9   read(unit=s, fmt='(g20.14)') d
  10   if (d + 0.18774312893273d0 .gt. 1d-13) call abort
  11 end program
  12