--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp2a/lambda-pack-init1.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,17 @@
+// { dg-do compile { target c++2a } }
+
+void bar();
+void bar(int);
+
+template <typename... Args>
+void foo(Args... args) {
+  [...xs=args]{
+    bar(xs...); // xs is an init-capture pack
+  };
+}
+
+int main()
+{
+  foo();  // OK: xs contains zero init-captures
+  foo(1); // OK: xs contains one init-capture
+}