--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/SemaTemplate/nested-incomplete-class.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -fsyntax-only %s
+
+template <typename T>
+struct foo {
+  struct bar;
+
+  bar fn() {
+    // Should not get errors about bar being incomplete here.
+    bar b = bar(1, 2);
+    return b;
+  }
+};
+
+template <typename T>
+struct foo<T>::bar {
+  bar(int, int);
+};
+
+void fn() {
+  foo<int>().fn();
+}