--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp1z/pr92536.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,23 @@
+// { dg-do compile { target c++17 } }
+
+namespace std
+{
+  struct stop_token { };
+
+  template<typename Callback>
+    struct stop_callback
+    {
+      template<typename C>
+      stop_callback(stop_token, C&&) { }
+    };
+
+template<typename _Callback>
+    stop_callback(stop_token, _Callback) -> stop_callback<_Callback>;
+}
+
+int main()
+{
+  std::stop_token tok;
+  std::function<void()> f([](){});  // { dg-error "not a member|not declared" }
+  std::stop_callback cb(tok, f);
+}