--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/func-params-00.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,42 @@
+//  { dg-do run }
+
+// Test promise construction from function args list.
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-ret-int-yield-int.h"
+
+struct coro1
+f (int x) noexcept
+{
+  PRINT ("coro1: about to return");
+  co_return 42;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  struct coro1 x = f (555);
+  int y = x.handle.promise().get_value();
+  if ( y != 555 )
+    {
+      PRINT ("main: incorrect ctor value");
+      abort ();
+    }
+  PRINTF ("main: after coro1 ctor %d - now resuming\n", y);
+  if (x.handle.done())
+    abort();
+  x.handle.resume();
+  PRINT ("main: after resume");
+  y = x.handle.promise().get_value();
+  if ( y != 42 )
+    abort ();
+  if (!x.handle.done())
+    {
+      PRINT ("main: apparently not done...");
+      abort ();
+    }
+  PRINT ("main: returning");
+  return 0;
+}