--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/lookup/pr84804.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,12 @@
+// { dg-do compile { target c++11 } }
+// PR c++/84804 ICE instantiating friend with default arg containing a lambda
+template<int> struct A
+{
+  // Note, instantiation injects this into ::, so there can only be one!
+  friend void foo(int i = []{ return 0;}()) {}
+};
+
+void bar()
+{
+  A<0> x;
+}