--- /dev/null
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
+namespace llvm {
+ template<typename T > struct StringSet;
+ template<int I > struct Int;
+ template <typename Inner, template <typename> class Outer>
+ struct TemplTempl;
+}
+
+namespace lld {
+ using llvm::StringSet;
+ using llvm::Int;
+ using llvm::TemplTempl;
+};
+
+namespace llvm {
+ template<typename T > struct StringSet;
+}
+
+template<typename T> struct Temp{};
+
+namespace llvm {
+ template<typename T = int> struct StringSet{};
+ template<int I = 5> struct Int{};
+ template <typename Inner, template <typename> class Outer = Temp>
+ struct TemplTempl{};
+};
+
+namespace lld {
+ StringSet<> s;
+ Int<> i;
+ TemplTempl<int> tt;
+}