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* [Bug fortran/41873]  New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
@ 2009-10-29 22:42 anlauf at gmx dot de
  2009-10-29 22:43 ` [Bug fortran/41873] " anlauf at gmx dot de
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: anlauf at gmx dot de @ 2009-10-29 22:42 UTC (permalink / raw)
  To: gcc-bugs

Hi,

the attached code compiles with ifort 11.1 and with nagfor 5.2,
but is rejected with current gfortran:


gfcbug93.f90:47.12:

    print *, ipmin% dot_g_g (g,g)
            1
Error: ABSTRACT INTERFACE 'dot' must not be referenced at (1)
gfcbug93.f90:47.12:

    print *, ipmin% dot_g_g (g,g)
            1
Error: ABSTRACT INTERFACE 'dot' must not be referenced at (1)


Cheers,
-ha


-- 
           Summary: [OOP] Bogus Error: ABSTRACT INTERFACE must not be
                    referenced...
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: anlauf at gmx dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
@ 2009-10-29 22:43 ` anlauf at gmx dot de
  2009-10-30 15:32 ` burnus at gcc dot gnu dot org
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: anlauf at gmx dot de @ 2009-10-29 22:43 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from anlauf at gmx dot de  2009-10-29 22:42 -------
Created an attachment (id=18931)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18931&action=view)
Test code


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
  2009-10-29 22:43 ` [Bug fortran/41873] " anlauf at gmx dot de
@ 2009-10-30 15:32 ` burnus at gcc dot gnu dot org
  2009-11-04 16:44 ` janus at gcc dot gnu dot org
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: burnus at gcc dot gnu dot org @ 2009-10-30 15:32 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #2 from burnus at gcc dot gnu dot org  2009-10-30 15:32 -------
I agree that the following error is bogus:

>    print *, ipmin% dot_g_g (g,g)
>            1
> Error: ABSTRACT INTERFACE 'dot' must not be referenced at (1)

While one might not access (type)%dot_g_g as "dot_g_g" is deferred, using
(class)%dot_g_g is valid.  (And using (type)%dot_g_g is not possible as one
cannot use "type(abstract_t)"; thus it might be enough to relax the check.)


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |janus at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |rejects-valid
   Last reconfirmed|0000-00-00 00:00:00         |2009-10-30 15:32:20
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
  2009-10-29 22:43 ` [Bug fortran/41873] " anlauf at gmx dot de
  2009-10-30 15:32 ` burnus at gcc dot gnu dot org
@ 2009-11-04 16:44 ` janus at gcc dot gnu dot org
  2009-11-04 20:13 ` janus at gcc dot gnu dot org
                   ` (4 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-04 16:44 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #3 from janus at gcc dot gnu dot org  2009-11-04 16:43 -------
(In reply to comment #0)
> Error: ABSTRACT INTERFACE 'dot' must not be referenced at (1)

The same error appears in PR 41556.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
                   ` (2 preceding siblings ...)
  2009-11-04 16:44 ` janus at gcc dot gnu dot org
@ 2009-11-04 20:13 ` janus at gcc dot gnu dot org
  2009-11-04 20:39 ` janus at gcc dot gnu dot org
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-04 20:13 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #4 from janus at gcc dot gnu dot org  2009-11-04 20:13 -------
Reduced test case:


  implicit none

  type, abstract :: inner_product_class
  contains
    procedure(dot), public, nopass, deferred :: dot_g_g
  end type

  abstract interface
    real function dot ()
    end function
  end interface

contains

  subroutine cg (ipmin)
    class(inner_product_class) :: ipmin
    print *, ipmin%dot_g_g ()
  end subroutine

end


Triggers the same error message as comment #0, which, in addition to being
bogus, appears twice.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
                   ` (3 preceding siblings ...)
  2009-11-04 20:13 ` janus at gcc dot gnu dot org
@ 2009-11-04 20:39 ` janus at gcc dot gnu dot org
  2009-11-05 10:43 ` janus at gcc dot gnu dot org
                   ` (2 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-04 20:39 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #5 from janus at gcc dot gnu dot org  2009-11-04 20:39 -------
(In reply to comment #2)
> While one might not access (type)%dot_g_g as "dot_g_g" is deferred, using
> (class)%dot_g_g is valid.  (And using (type)%dot_g_g is not possible as one
> cannot use "type(abstract_t)"; thus it might be enough to relax the check.)

It might be okay for type-bound procedures. However, this check should also
catch the usage of simple abstract procedures, i.e. when adding the following
to the test case in comment #4:

print *, dot()

This is illegal of course, and is not caught without the check in
resolve_function.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
                   ` (4 preceding siblings ...)
  2009-11-04 20:39 ` janus at gcc dot gnu dot org
@ 2009-11-05 10:43 ` janus at gcc dot gnu dot org
  2009-11-05 10:45 ` janus at gcc dot gnu dot org
  2009-11-05 10:45 ` janus at gcc dot gnu dot org
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-05 10:43 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #6 from janus at gcc dot gnu dot org  2009-11-05 10:43 -------
Subject: Bug 41873

Author: janus
Date: Thu Nov  5 10:42:48 2009
New Revision: 153934

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153934
Log:
2009-11-05  Janus Weil  <janus@gcc.gnu.org>

        PR fortran/41556
        PR fortran/41873
        * resolve.c (resolve_function,resolve_call): Prevent abstract
interfaces
        from being called, but allow deferred type-bound procedures with
        abstract interface.


2009-11-05  Janus Weil  <janus@gcc.gnu.org>

        PR fortran/41556
        PR fortran/41873
        * gfortran.dg/interface_abstract_4.f90: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/interface_abstract_4.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/resolve.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
                   ` (5 preceding siblings ...)
  2009-11-05 10:43 ` janus at gcc dot gnu dot org
@ 2009-11-05 10:45 ` janus at gcc dot gnu dot org
  2009-11-05 10:45 ` janus at gcc dot gnu dot org
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-05 10:45 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #7 from janus at gcc dot gnu dot org  2009-11-05 10:45 -------
Fixed with r153934. Closing.


-- 

janus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug fortran/41873] [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced...
  2009-10-29 22:42 [Bug fortran/41873] New: [OOP] Bogus Error: ABSTRACT INTERFACE must not be referenced anlauf at gmx dot de
                   ` (6 preceding siblings ...)
  2009-11-05 10:45 ` janus at gcc dot gnu dot org
@ 2009-11-05 10:45 ` janus at gcc dot gnu dot org
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu dot org @ 2009-11-05 10:45 UTC (permalink / raw)
  To: gcc-bugs



-- 

janus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |janus at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-10-30 15:32:20         |2009-11-05 10:44:50
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41873


^ permalink raw reply	[flat|nested] 9+ messages in thread
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2009-10-29 22:43 ` [Bug fortran/41873] " anlauf at gmx dot de
2009-10-30 15:32 ` burnus at gcc dot gnu dot org
2009-11-04 16:44 ` janus at gcc dot gnu dot org
2009-11-04 20:13 ` janus at gcc dot gnu dot org
2009-11-04 20:39 ` janus at gcc dot gnu dot org
2009-11-05 10:43 ` janus at gcc dot gnu dot org
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