[Bug fortran/47745] [OOP] Segfault with CLASS(*) and derived type dummy arguments

[janus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47745

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #3 from janus at gcc dot gnu.org 2011-02-15 10:22:33 UTC ---
(In reply to comment #1)
> Note: CLASS(*) -- i.e. unlimited polymorphism -- is not yet supported; however,
> there should be no an internal compiler error.

Right. We definitely need a better rejection of CLASS(*). Draft patch:

Index: gcc/fortran/decl.c
===================================================================
--- gcc/fortran/decl.c    (revision 170156)
+++ gcc/fortran/decl.c    (working copy)
@@ -2613,6 +2613,16 @@ gfc_match_decl_type_spec (gfc_typespec *ts, int im
     ts->type = BT_DERIVED;
   else
     {
+      /* Match CLASS declarations.  */
+      m = gfc_match (" class ( * )");
+      if (m == MATCH_ERROR)
+    return MATCH_ERROR;
+      else if (m == MATCH_YES)
+    {
+      gfc_fatal_error ("Unlimited polymorphism at %C not yet supported");
+      return MATCH_ERROR;
+    }
+
       m = gfc_match (" class ( %n )", name);
       if (m != MATCH_YES)
     return m;