Declaring size of array using non-parameters

Hello,

I am working on Intel Visual Fortran 11.1 and have a question on declaring an array in a subroutine by defining the size of the array using an argument. The argument can vary each time the subroutine is called, and the compiler does not provide an error, nor a warning.

program main
call suppre(5)
call suppre(6)
stop
end

subroutine suppre(ivar)
integer ivar
real, dimension(ivar) :: array

end subroutine

My question: What are the drawbacks of this practice?