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! { dg-do run }
program main
implicit none
integer, parameter :: n=5, m=3
character(len=5), dimension(n) :: a
character(len=5), dimension(n,m) :: b
character(len=5) :: res
integer, dimension(n,m) :: v
real, dimension(n,m) :: r
integer :: i,j
logical, dimension(n,m) :: mask
character(len=5), dimension(:,:), allocatable :: empty
character(len=5) , parameter :: all_zero = achar(0) // achar(0) // achar(0) // achar(0) // achar(0)
logical :: smask
write (unit=a,fmt='(I5.5)') (21-i*i+6*i,i=1,n)
res = maxval(a)
if (res /= '00030') STOP 1
res = maxval(a,dim=1)
if (res /= '00030') STOP 2
do
call random_number(r)
v = int(r * 100)
if (count (v>20) > 1) exit
end do
write (unit=b,fmt='(I5.5)') v
write (unit=res,fmt='(I5.5)') maxval(v)
if (res /= maxval(b)) STOP 3
smask = .true.
if (res /= maxval(b, smask)) STOP 4
smask = .false.
if (all_zero /= maxval(b, smask)) STOP 5
mask = v > 20
write (unit=res,fmt='(I5.5)') maxval(v,mask)
if (res /= maxval(b, mask)) STOP 6
mask = .false.
if (maxval(b, mask) /= all_zero) STOP 7
allocate (empty(0:3,0))
res = maxval(empty)
if (res /= all_zero) STOP 8
end program main
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