1 files changed, 17 insertions, 0 deletions
diff --git a/clang/test/SemaTemplate/lambda-capture-pack.cpp b/clang/test/SemaTemplate/lambda-capture-pack.cpp
new file mode 100644
index 00000000000..2fe576769db
--- /dev/null
+++ b/clang/test/SemaTemplate/lambda-capture-pack.cpp
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -std=c++2a -verify %s
+// expected-no-diagnostics
+
+template<typename ...T, typename ...Lambda> void check_sizes(Lambda ...L) {
+  static_assert(((sizeof(T) == sizeof(Lambda)) && ...));
+}
+
+template<typename ...T> void f(T ...v) {
+  // Pack expansion of lambdas: each lambda captures only one pack element.
+  check_sizes<T...>([=] { (void)&v; } ...);
+
+  // Pack expansion inside lambda: captures all pack elements.
+  auto l = [=] { ((void)&v, ...); };
+  static_assert(sizeof(l) >= (sizeof(T) + ...));
+}
+
+template void f(int, char, double);