Potential BUG with array constructor actual argument + unlimited polymorphic assumed shape array dummy argument + allocate with source=

[vsande <vsande@cimne.upc.edu>]

Dear all,

when compiling with gfortran 5.1.0 the program
displayed below, and executing it, I obtain the following output
on stdout:

vsande@LSSC-T1700:~$ ./a.out
            2           3           0
            1           2           3
            1           2           3

It seems from this output that the first call to allocate_poly_poly,
is not copying properly the unlimited polymorphic assumed shape array
dummy argument "source_expr" into the newly allocated unlimited polymorphic
allocatable dummy argument "vector", whenever the actual argument 
provided to
"source_expr" is an array constructor. This does not happen in the 
second call
to allocate_poly_poly, whenever the actual argument is an array 
variable, or whenever
"source_expr" dummy argument is declared as integer, intent(in) :: 
source_expr(:), even
when the array constructor is passed; see call to subroutine 
allocate_poly_integer.

Am I doing something wrong with to the Fortran200X standard? Is this a 
BUG of the
gfortran 5.1.0 compiler?

I did the same test with ifort 14.0.1 with the following (expected) results:

vsande@LSSC-T1700:~$ ifort test.f90
vsande@LSSC-T1700:~$ ./a.out
            1           2           3
            1           2           3
            1           2           3

Thanks for your help in advance.
Best regards,
  Víctor.


program test
   implicit none
   class(*), allocatable :: v(:)
   integer :: iv(3) = (/1,2,3/)

   ! 1st call
   call allocate_poly_poly ( v, (/1,2,3/) )
   select type ( p=>v )
   type is ( integer )
     write(*,*) p
   end select
   deallocate(v)

   ! 2nd call
   call allocate_poly_poly ( v, iv )
   select type ( p=>v )
   type is ( integer )
     write(*,*) p
   end select
   deallocate(v)

   call allocate_poly_integer ( v, (/1,2,3/) )
   select type ( p=>v )
   type is ( integer )
     write(*,*) p
   end select
   deallocate(v)

contains
   subroutine allocate_poly_poly ( vector, source_expr )
     implicit none
     class(*), allocatable, intent(out) :: vector(:)
     class(*)             , intent(in)  :: source_expr(:)
     allocate(vector(size(source_expr)), source=source_expr)
   end subroutine

   subroutine allocate_poly_integer ( vector, source_expr )
     implicit none
     class(*), allocatable, intent(out) :: vector(:)
     integer             , intent(in)  :: source_expr(:)
     allocate(vector(size(source_expr)), source=source_expr)
   end subroutine
end program