re PR c++/64901 (overriding final function defined out of line does not lead to an error)

	PR c++/64901
	* decl.c (duplicate_decls): Also duplicate DECL_FINAL_P and
	DECL_OVERRIDE_P.

From-SVN: r220363

gcc/cp/ChangeLog

+2015-02-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
+
+	PR c++/64901
+	* decl.c (duplicate_decls): Also duplicate DECL_FINAL_P and
+	DECL_OVERRIDE_P.
+
 2015-02-02  Jason Merrill  <jason@redhat.com>
 
 	* tree.c (handle_abi_tag_attribute): Diagnose invalid arguments.

gcc/cp/decl.c

@@ -1813,6 +1813,8 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
       DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
       DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
       DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
+      DECL_FINAL_P (newdecl) |= DECL_FINAL_P (olddecl);
+      DECL_OVERRIDE_P (newdecl) |= DECL_OVERRIDE_P (olddecl);
       DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
       if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
 	SET_OVERLOADED_OPERATOR_CODE

gcc/testsuite/g++.dg/cpp0x/override1.C

@@ -4,8 +4,11 @@ struct B
   virtual void f() final {}
   virtual void g() {}
   virtual void x() const {}
+  virtual void y() final;
 };
 
+void B::y() {} // { dg-error "overriding" }
+
 struct B2
 {
   virtual void h() {}
@@ -14,6 +17,7 @@ struct B2
 struct D : B
 {
   virtual void g() override final {} // { dg-error "overriding" }
+  virtual void y() override final {} // { dg-error "virtual" }
 };
 
 template <class T> struct D2 : T