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+// Copyright (C) 2005 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 2 Apr 2005 <nathan@codesourcery.com>
+
+// PR 20723
+// Origin: Andrew Pinski <pinskia@gcc.gnu.org>
+// Nathan Sidwell <nathan@gcc.gnu.org>
+
+struct Foo
+{
+ template <typename T>
+ Foo (const T &); // { dg-error "T = Bar" "" }
+};
+
+struct Bar
+{
+ template <typename T>
+ operator T () const; // { dg-error "T = Foo" "" }
+};
+
+Foo Quux (Bar const &b)
+{
+ return b; // { dg-error "ambiguous" "" }
+}
+
+