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From: "jilfa12 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/51995] Polymorphic class fails at runtime
Date: Wed, 25 Jan 2012 11:39:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51995

--- Comment #4 from Prince <jilfa12 at yahoo dot com> 2012-01-25 11:16:29 U=
TC ---
Thanks Dominiq.

I tested the program on i686 GNU/Linux running on Ubuntu-Maverick using gcc
version 4.7.0 20120118 (experimental) (GCC).

Using ifort 12, it gives the correct results.

So it is definitely a bug in gfortran. Do you have any work-around?



________________________________
 From: dominiq at lps dot ens.fr <gcc-bugzilla@gcc.gnu.org>
To: jilfa12@yahoo.com=20
Sent: Wednesday, January 25, 2012 12:59 PM
Subject: [Bug fortran/51995] Polymorphic class fails at runtime

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51995

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-0=
1-25
10:59:09 UTC ---
I confirm that on x86_64-apple-darwin10 from
gcc version 4.6.0 20100723 (experimental) [trunk revision 162456] (GCC) up =
to
now,
gfortran gives the following errors for the test

pr51995.f90:91.31:

=C2=A0 =C2=A0 CALL db_connect%description()
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0  1
Error: 'description' at (1) is not a member of the 'connection' structure
pr51995.f90:98.31:

=C2=A0 =C2=A0 CALL db_connect%description()
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0  1
Error: 'description' at (1) is not a member of the 'connection' structure

while up to
gcc version 4.6.0 20100413 (experimental) [trunk revision 158252] (GCC)
it gives

pr51995.f90:15.28:

=C2=A0 =C2=A0  PROCEDURE(generic_desc), DEFERRED, PASS(self) :: description
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 1
Error: Passed-object dummy argument of 'generic_desc' at (1) must not be
POINTER
pr51995.f90:82.23:

=C2=A0 =C2=A0 USE factory_pattern
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0  1
Fatal Error: Can't open module file 'factory_pattern.mod' for reading at (1=
):
No such file or directory

Also gcc version 4.6.0 20100506 (experimental) [trunk revision 159106] (GCC)
gives

f951: internal compiler error: in find_typebound_proc_uop, at
fortran/symbol.c:5255
Please submit a full bug report,

So if it has worked, it looks like a transient.