intent(inout) pointer can not be passed as intent(inout) pointer?

[Grady_Schofield]

The following code produces an error.

module inout_inout
contains
subroutine sub1( ptr )integer, pointer, intent( inout ) :: ptrnullify( ptr )
end subroutine
subroutine sub2( ptr )integer, pointer, intent( inout ) :: ptrnullify( ptr )call sub1( ptr ) !**** This is the line of the error
end subroutine
end module
The error is this:
Error1 Error: A pointer dummy argument with the INTENT(IN) attribute shall not appear as an actual argument if the associated dummy argument has the INTENT(OUT) or INTENT(INOUT) attribute. [PTR]S:srcdisk_io_testpointer_to_pointermod.f9022
I'm a little suspicious that there may be a compiler problem since the error message is saying sub2's pointer is intent(in) and not intent(inout), and I can't see why what I have here would be illegal.

[Steven_L_Intel1]

This is a compiler bug previously reported - it will be fixed in a future release.

[Grady_Schofield]

Is there a public list of open compiler bugs? I am doing things with linked lists and a binary tree, and would like to know of any more pointer related gotcha's.

It seems that there is also a problem with modifying the contents of an object pointed to by an intent(in) pointer.

module pointer_pointer
type data_structinteger :: int_datainteger, pointer :: int_ptr
end type
contains
subroutine sub1( ptr )implicit nonetype( data_struct ), pointer, intent( in ) :: ptrtype( data_struct ), pointer :: null_ptr => null( )integer, target :: x
ptr => null_ptr     !**** This should cause an error
ptr%int_data = x    !**** This should not
ptr%int_ptr => x    !**** This should not
end subroutine
subroutine sub2( ptr )implicit nonetype( data_struct ), pointer, intent( in ) :: ptrtype( data_struct ), pointer :: tmp_ptrinteger, target :: x
tmp_ptr => ptr
tmp_ptr%int_data = x
tmp_ptr%int_ptr => x
end subroutine
end module
There are no errors in sub2, and this is the work-around I have for this problem.  But the three commented lines in sub1 all
produce errors.  I'm a little suspicious since the third line produces the same error as the first line.  It seems the compiler
doesn't understand what is going on.  These are the errors.
Error1 Error: A
 pointer dummy argument with the INTENT(IN) attribute shall not appear as an pointer-object in a pointer-assignment-stmt or nullify-stmt. [PTR]S:srcdisk_io_testpointer_to_pointersubr.f9022
Error2 Error: A dummy argument with the INTENT(IN) attribute shall not appear in a variable definition context [PTR]S:srcdisk_io_testpointer_to_pointersubr.f9023
Error3 Error: A pointer dummy argument with the INTENT(IN) attribute shall not appear as an pointer-object in a pointer-assignment-stmt or nullify-stmt. [PTR]S:srcdisk_io_testpointer_to_pointersubr.f9024

[Steven_L_Intel1]

There is no public list. Most known errors would be very difficult to describe in a meaningful fashion.

I will need to study your new example - I'll get back to you on Monday. At first glance, Error 1 seems correct but I agree that the other two may not be.

[Steven_L_Intel1]

I agree with the comments in your code - the first assignment should be an error (and is reported as one.) The second and third should be allowed but aren't. I'll report this to the developers. Thanks for bringing it to our attention.