1 files changed, 16 insertions, 0 deletions
diff --git a/test/SemaTemplate/temp_arg_pack.cpp b/test/SemaTemplate/temp_arg_pack.cpp
index b79dca78bced8..26e3f6ba5e5e6 100644
--- a/test/SemaTemplate/temp_arg_pack.cpp
+++ b/test/SemaTemplate/temp_arg_pack.cpp
@@ -6,3 +6,19 @@ namespace deduce_pack_non_pack {
   template <typename T> void g(C<A<T>>); // expected-note {{candidate template ignored: deduced type 'C<A<[...], (no argument)>>' of 1st parameter does not match adjusted type 'C<A<[...], int>>' of argument [with T = bool]}}
   void h(C<A<bool, int>> &x) { g(x); } // expected-error {{no matching function}}
 }
+
+namespace pr39231 {
+  template<typename T, T ...V> struct integer_sequence {};
+
+  template <typename T, T... A, T... B>
+  int operator^(integer_sequence<T, A...> a, // expected-note {{deduced conflicting values for parameter 'A' (<1, 2, 3> vs. <4, 5, 6>)}}
+                integer_sequence<T, A...> b);
+
+  int v = integer_sequence<int, 1, 2, 3>{} ^ integer_sequence<int, 4, 5, 6>{}; // expected-error {{invalid operands}}
+
+  template <typename T, T... A, T... B>
+  integer_sequence<T, A + B...> operator+(integer_sequence<T, A...> a,
+                                          integer_sequence<T, B...> b);
+  integer_sequence<int, 5, 7, 9> w =
+      integer_sequence<int, 1, 2, 3>{} + integer_sequence<int, 4, 5, 6>{};
+}