gcc-4.4.0/gcc/testsuite/gfortran.dg/c_ptr_tests_13.f03

! { dg-do compile }
! Ensure that the user cannot call the structure constructor for one of 
! the iso_c_binding derived types.
!
! PR fortran/33760
!
program main
   use ISO_C_BINDING
   implicit none
   integer(C_INTPTR_T) p
   type(C_PTR) cptr
   p = 0
   cptr = C_PTR(p+1) ! { dg-error "Components of structure constructor" }
   cptr = C_PTR(1) ! { dg-error "Components of structure constructor" } 
end program main