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diff --git a/libstdc++-v3/testsuite/ext/ext_pointer/1_neg.cc b/libstdc++-v3/testsuite/ext/ext_pointer/1_neg.cc
new file mode 100644
index 00000000..e39c3212
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/ext_pointer/1_neg.cc
@@ -0,0 +1,103 @@
+// Bob Walters 10-2008
+
+// Test for Container using non-standard pointer types.
+
+// Copyright (C) 2008, 2009
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// .
+
+
+// { dg-do compile }
+
+#include
+#include
+#include
+
+using __gnu_cxx::_Pointer_adapter;
+using __gnu_cxx::_Relative_pointer_impl;
+using __gnu_cxx::__static_pointer_cast;
+using __gnu_cxx::__const_pointer_cast;
+
+
+struct A {
+ int i;
+};
+struct B : public A{
+ int j;
+};
+typedef _Pointer_adapter<_Relative_pointer_impl > B_pointer;
+typedef _Pointer_adapter<_Relative_pointer_impl > const_B_pointer;
+typedef _Pointer_adapter<_Relative_pointer_impl > A_pointer;
+typedef _Pointer_adapter<_Relative_pointer_impl > const_A_pointer;
+
+
+void test01(void) {
+ bool test __attribute__((unused)) = true;
+
+ A a;
+ B b;
+
+ A_pointer aptr( &a );
+
+ // Can't implicitly cast from A* to B*
+ B_pointer bptr1(aptr); // { dg-error "instantiated from here" 31 }
+ B_pointer bptr2(&a); // { dg-error "instantiated from here" 32 }
+
+ // but explicit cast/conversion is OK.
+ B_pointer bptr3(__static_pointer_cast(aptr)); // ok
+ B_pointer bptr4(__static_pointer_cast(&a)); // ok
+
+ // Can't implicitly cast from A* to B*
+ bptr1 = aptr; // { dg-error "instantiated from here" 39 }
+ bptr1 = &a; // { dg-error "instantiated from here" 40 }
+
+ // but explicit cast/conversion is OK.
+ bptr1 = __static_pointer_cast(aptr); // ok
+ bptr1 = __static_pointer_cast(&a); // ok
+
+ // Similarly, can't shed constness via implicit cast
+ const_A_pointer captr(&a);
+ A_pointer aptr2(captr); // { dg-error "instantiated from here" 48 }
+
+ // but explicit cast/conversion is OK.
+ A_pointer aptr3(__const_pointer_cast(captr)); // ok
+
+ // Similarly, can't shed constness via implicit cast
+ aptr2 = captr; // { dg-error "instantiated from here" 54 }
+
+ // but explicit cast/conversion is OK.
+ aptr3 = __const_pointer_cast(captr); // ok
+
+ // Combine explicit const cast with implicit downcast.
+ const_B_pointer cbptr(&b);
+ A_pointer aptr4(cbptr); // { dg-error "instantiated from here" 61 }
+ aptr4 = cbptr; // { dg-error "instantiated from here" 62 }
+
+ A_pointer aptr5(__const_pointer_cast(cbptr)); // ok
+ aptr5 = __const_pointer_cast(cbptr); // ok
+}
+
+// { dg-error "invalid conversion " "" { target *-*-* } 294 }
+// { dg-error "initializing argument 1 of" "" { target *-*-* } 294 }
+// { dg-error "invalid conversion " "" { target *-*-* } 300 }
+// { dg-error "initializing argument 1 of" "" { target *-*-* } 300 }
+// { dg-error "invalid conversion " "" { target *-*-* } 317 }
+// { dg-error "initializing argument 1 of" "" { target *-*-* } 317 }
+// { dg-error "invalid conversion " "" { target *-*-* } 325 }
+// { dg-error "initializing argument 1 of" "" { target *-*-* } 325 }
+// { dg-excess-errors "In constructor" }
+