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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/99602] [11 regression] runtime error: pointer actual
 argument not associated
Date: Fri, 19 Mar 2021 09:35:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99602

--- Comment #28 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to J=C3=BCrgen Reuter from comment #27)
> Created attachment 50432 [details]
> reproducer, down to 6800 lines

Hi Juergen,

Stop! Yesterday's final is just fine. The problem is connected with the log=
ic
selecting the runtime error. The code for line 483 ends with

                      D.5856 =3D model->_vptr->get_par_data_ptr (&model.110,
D.5855);
                      if ((character(kind=3D1)[0:][1:1] * restrict)
D.5855->chars.data !=3D 0B)
                        {
                          __builtin_free ((void *) D.5855->chars.data);
                          (character(kind=3D1)[0:][1:1] * restrict)
D.5855->chars.data =3D 0B;
                        }
                      if ((integer(kind=3D8)) (D.5856._data =3D=3D 0B))
                        {
                          _gfortran_runtime_error_at (&"At line 483 of file
models.f90"[1]{lb: 1 sz: 1}, &"Proc-pointer actual argument \'model\' is not
associated"[1]{lb: 1 sz: 1});
                        }
                      field_data_set (&class.109, 0B, 0B, 0B, 0B, 0B, 0B, 0=
B,
0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, 0B, &D.5856, 0B,
0B, 0B);
                    }

The _data field of D.5856 is the result of the call to 'get_par_data_ptr' n=
ot
the procedure pointer itself. The result is:
class(modelpar_data_t), pointer :: ptr and the formal argument is:
class(modelpar_data_t), intent(in), pointer, optional :: mass_data

So the call is perfectly proper. The trouble is that the attributes of the
proc_pointer result are not being used.

I am about to start a gdb session :-)

Paul=