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diff --git a/clang/test/SemaTemplate/dependent-names-no-std.cpp b/clang/test/SemaTemplate/dependent-names-no-std.cpp
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+++ b/clang/test/SemaTemplate/dependent-names-no-std.cpp
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+// RUN: %clang_cc1 -fsyntax-only -verify %s
+//
+// The whole point of this test is to verify certain diagnostics work in the
+// absence of namespace 'std'.
+
+namespace PR10053 {
+  namespace ns {
+    struct Data {};
+  }
+
+  template<typename T> struct A {
+    T t;
+    A() {
+      f(t); // expected-error {{call to function 'f' that is neither visible in the template definition nor found by argument-dependent lookup}}
+    }
+  };
+
+  void f(ns::Data); // expected-note {{in namespace 'PR10053::ns'}}
+
+  A<ns::Data> a; // expected-note {{in instantiation of member function}}
+}