http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46897
janus at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[OOP] Polymorphic type - |defined ASSIGNMENT(=) not |defined ASSIGNMENT(=) not |used for derived type |used |component --- Comment #2 from janus at gcc dot gnu.org 2010-12-12 22:25:52 UTC --- I think one can run into the same problem already without polymorphism: module m implicit none type component end type interface assignment(=) module procedure assign end interface type t type(component) :: foo end type contains subroutine assign(lhs,rhs) type(component), intent(out) :: lhs type(component), intent(in) :: rhs print *,'defined assignment called' end subroutine end module program main use m implicit none type(t) :: infant, newchild infant = newchild end