Index: clang/lib/Sema/SemaLookup.cpp
===================================================================
--- clang/lib/Sema/SemaLookup.cpp
+++ clang/lib/Sema/SemaLookup.cpp
@@ -2723,8 +2723,10 @@
   if (!Result.addClassTransitive(Class))
     return;
 
-  // Only recurse into base classes for complete types.
-  if (!Result.S.isCompleteType(Result.InstantiationLoc,
+  // Only recurse into base classes for complete types and for class templates
+  // that that have been instantiated.
+  if (!Result.InstantiationLoc.getPtrEncoding() ||
+      !Result.S.isCompleteType(Result.InstantiationLoc,
                                Result.S.Context.getRecordType(Class)))
     return;
 
Index: clang/test/SemaCXX/template-specialization.cpp
===================================================================
--- clang/test/SemaCXX/template-specialization.cpp
+++ clang/test/SemaCXX/template-specialization.cpp
@@ -19,3 +19,16 @@
   B::foo<4>(); // expected-note {{in instantiation of function template specialization 'B::foo<4>'}}
   return 0;
 }
+
+template <typename T>
+struct z {
+  static void aj() {
+    T f;
+#pragma omp target map(f)
+    ;
+  }
+};
+
+template <typename> class ar {};
+template <int> struct as {};
+template class z<ar<as<4>>>;