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! { dg-do compile }

! PR32489 Endless loop when compiling.

! Derived from fft257.f90, Public domain 2004 James Van Buskirk.

! Note: The problem solved here was not an infinite loop issue. Middle-end

! could not handle the array constructor unfolded by the front end.

! WARNING: Potential resource hog.

! Jerry DeLisle  

program test

   implicit none

   integer, parameter :: dp = selected_real_kind(15,300)

   integer, parameter :: N = 257

   complex(dp) h1(0:N-1)

   complex(dp) h2(0:N-1)

   complex(dp) hh(0:N-1)

   complex(dp), parameter :: ri(2) = (/(1,0),(0,1)/)

   integer i, j, k, L

   real(dp) pi

   pi = 4*atan(1.0_dp)

   do i = 0, N-1

     do j = 1, 2

       h2 = 0

       h2(i) = ri(j)

       h1 = (/(sum((/(exp(-2*pi*(0,1)*mod(k*L,N)/N)*h2(L),L=0,N-1)/)),k=0,N-1)/)

     end do

   end do

end program test