--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-this21.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,10 @@
+// PR c++/66999 - 'this' captured by reference.
+// { dg-do compile { target c++11 } }
+
+struct X {
+  void bar (int n)
+    {
+      auto l1 = [&this] { }; // { dg-error ".this. cannot be captured by reference" }
+      auto l2 = [=, &this] { }; // { dg-error ".this. cannot be captured by reference" }
+    }
+};