1 files changed, 12 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/GH156458.cpp b/clang/test/SemaCXX/GH156458.cpp
new file mode 100644
index 000000000000..1e054a0958a8
--- /dev/null
+++ b/clang/test/SemaCXX/GH156458.cpp
@@ -0,0 +1,12 @@
+//RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s
+
+// Force a fatal error
+#include <unknownheader> // expected-error {{file not found}}
+
+namespace N {}
+
+enum class E {};
+using enum N::E::V;
+
+using T = int;
+using enum N::T::v;