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Subject: [Bug fortran/55855] New: incorrect warning with type-bound procedure pointer
Date: Thu, 03 Jan 2013 07:29:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D55855

             Bug #: 55855
           Summary: incorrect warning with type-bound procedure pointer
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: abensonca@gmail.com


The following:

module eventMod
=C2=A0 type, public :: event
=C2=A0 =C2=A0 =C2=A0private
=C2=A0 =C2=A0 procedure(eventTask ), pointer, public :: task
=C2=A0end type event
=C2=A0 abstract interface
=C2=A0 =C2=A0 =C2=A0logical function eventTask(self)
=C2=A0 =C2=A0 =C2=A0 =C2=A0import event
=C2=A0 =C2=A0 =C2=A0 =C2=A0class(event), intent(in) :: self
=C2=A0 =C2=A0 =C2=A0end function eventTask
=C2=A0 end interface
end module eventMod
program test
=C2=A0 use eventMod
=C2=A0 implicit none
=C2=A0 logical :: r
=C2=A0 type(event), pointer :: myEvent
=C2=A0 allocate(myEvent)
=C2=A0 r=3DmyEvent%task()
end program test

causes the following warning when compiled (with gfortran 4.8.0):

$ gfortran -v
Using built-in specs.
COLLECT_GCC=3Dgfortran
COLLECT_LTO_WRAPPER=3D/home/abenson/Galacticus/Tools/libexec/gcc/x86_64-unk=
nown-
linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure --
prefix=3D/home/abenson/Galacticus/Tools --enable-languages=3Dc,c++,fortran =
--
disable-multilib --with-gmp=3D/home/abenson/Galacticus/Tools
Thread model: posix
gcc version 4.8.0 20121219 (experimental) (GCC)

$ gfortran -o warn.exe warn.F90 -Wall
warn.F90:19.4:

=C2=A0 r=3DmyEvent%task()
=C2=A0 =C2=A0 1
Warning: POINTER valued function appears on right-hand side of assignment at
(1)

As far as I can tell, the code runs correctly despite this warning.

the warning is spurious as the "task" function returns a logical, not a
pointer.