https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78033
--- Comment #2 from kargl at gcc dot gnu.org --- (In reply to kargl from comment #1) > Reduced testcase. > > function f(n, x) > integer, intent(in) :: n > complex, intent(in) :: x(1:n) > real :: f > f = g([real(x(1:n)), aimag(x(1:n))]) > end function f > > If the array sections are removed in favor of the whole array, > the code compiles. Even further reduction. subroutine f(n, x) integer, intent(in) :: n complex, intent(in) :: x(1:n) real :: y(2*n) y = [real(x(1:n), aimag(x(1:n))] end subroutine f The constructor with array sections is going south.