1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/pr8570.C b/gcc/testsuite/g++.dg/warn/pr8570.C
new file mode 100644
index 000000000..608f4d6b5
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/pr8570.C
@@ -0,0 +1,13 @@
+// PR c++/8570
+// { dg-do compile }
+// { dg-options "" }
+template <typename T, typename P>
+class X { // { dg-message "note: previous declaration .* used 2" }
+public:
+  X() { }
+
+private:
+  template <typename U> friend class X; // { dg-error "redeclared with 1 template parameter" }
+};
+
+X<int, int> i;		// { dg-message "instantiated" }