[Bug fortran/58009] Elements with same value in vector subscript in variable definition context

[tkoenig at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58009

--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I also want to catch

a([i,j,i]) = ...

for which I cannot think of an algorithm which is O(n),
so I guess it will have to be O(n**2).