http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57697
--- Comment #10 from Tobias Burnus <burnus at gcc dot gnu.org> --- Still doesn't correctly work as the following code shows: if (_F.DA0 == 0B) _F.DA0 = left; … finally { if (left != 0B) __builtin_free ((void *) left); if (_F.DA0 != 0B) __builtin_free ((void *) _F.DA0); Which causes a double free! module m0 implicit none type component integer :: i = 42 contains procedure :: assign0 generic :: assignment(=) => assign0 end type type parent type(component) :: foo end type contains elemental subroutine assign0(lhs,rhs) class(component), intent(INout) :: lhs class(component), intent(in) :: rhs lhs%i = 20 end subroutine end module program main use m0 implicit none block type(parent), allocatable :: left type(parent) :: right print *, right%foo left = right print *, left%foo if (left%foo%i /= 20) call abort() end block end