1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/modules/lambda-12.h b/gcc/testsuite/g++.dg/modules/lambda-12.h
new file mode 100644
index 00000000000..4dd329d4760
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/lambda-12.h
@@ -0,0 +1,27 @@
+// PR c++/122310
+struct Foo {
+  constexpr static inline auto do_nothing = [](auto && ...){};
+  using TNothing = decltype(do_nothing);
+};
+
+template <typename T>
+struct X {
+  struct Inner {
+    union MoreInner {
+      static constexpr auto x = []{};
+#if __cplusplus >= 202002L
+      static decltype([]{}) y;
+#endif
+    };
+  };
+
+  using A = decltype(Inner::MoreInner::x);
+#if __cplusplus >= 202002L
+  using B = decltype(Inner::MoreInner::y);
+#endif
+};
+
+inline X<int>::A* a{};
+#if __cplusplus >= 202002L
+inline X<int>::B* b{};
+#endif