program prog
common /block/ i
equivalence (a, b, c), (i, j, k ,l)
a = 1.0
b = 2.0
c = 3.0
i = 1
j = 2
k = 3
l = 4
if ((a .ne. 3.0) .or. (b .ne. 3.0) .or. (c .ne. 3.0)) call abort ()
if ((i .ne. 4) .or. (j .ne. 4) .or. (k .ne. 4) .or. (l .ne. 4)) &
call abort ()
end program