gcc/testsuite/gfortran.dg/allocate_zerosize_1.f90

   1 ! { dg-do run }
   2 program main
   3   implicit none
   4   real, allocatable :: a(:), b(:,:)
   5   integer :: n,m
   6   character (len=2) :: one, two
   7
   8   one = ' 1'
   9   two = ' 2'
  10
  11   allocate (a(1:-1))
  12   if (size(a) /= 0) call abort
  13   deallocate (a)
  14
  15   allocate (b(1:-1,0:10))
  16   if (size(b) /= 0) call abort
  17   deallocate (b)
  18
  19   ! Use variables for array bounds.  The internal reads
  20   ! are there to hide fact that these are actually constant.
  21
  22   read (unit=one, fmt='(I2)') n
  23   allocate (a(n:-1))
  24   if (size(a) /= 0) call abort
  25   deallocate (a)
  26
  27   read (unit=two, fmt='(I2)') m
  28   allocate (b(1:3, m:0))
  29   if (size(b) /= 0) call abort
  30   deallocate (b)
  31 end program main