[Bug fortran/50410] [7/8/9 Regression] ICE in record_reference, pointer variable in data statement

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50410

--- Comment #34 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Vittorio Zecca from comment #2)
> The following produces a Segmentation fault in gfc_conv_structure (r178925)
> 
>       type t
>        integer g
>       end type
>       type(t) :: u=t(1)
>       data u%g /2/
>       end

This is fixed, for example, by

Index: resolve.c
===================================================================
--- resolve.c   (Revision 269895)
+++ resolve.c   (Arbeitskopie)
@@ -15917,6 +15917,13 @@ resolve_data_variables (gfc_data_variable *d)
          if (!resolve_data_variables (d->list))
            return false;
        }
+      if (d->expr->symtree && d->expr->symtree->n.sym
+         && d->expr->symtree->n.sym->value)
+       {
+         gfc_error ("Variable at %L already has an initializer",
+                    &d->expr->where);
+         return false;
+       }
     }

   return true;

While (probably) correct, this is far from complete.