[committed] testsuite: Add testcase for already fixed PR [PR102489]

[Jakub Jelinek via Gcc-patches]

Hi!

This got broken with r12-3529 and fixed with r12-5255.

Tested on x86_64-linux, committed to trunk as obvious.

2022-03-22  Jakub Jelinek  <ja...@redhat.com>

        PR c++/102489
        * g++.dg/coroutines/pr102489.C: New test.

--- gcc/testsuite/g++.dg/coroutines/pr102489.C.jj       2022-03-22 
15:34:00.372804315 +0100
+++ gcc/testsuite/g++.dg/coroutines/pr102489.C  2022-03-22 15:35:06.205900644 
+0100
@@ -0,0 +1,16 @@
+// PR c++/102489
+// { dg-do compile }
+// { dg-additional-options "-O" }
+
+#include <coroutine>
+
+struct footask {
+  struct promise_type {
+    std::suspend_never initial_suspend();
+    std::suspend_never final_suspend() noexcept;
+    void unhandled_exception();
+    void get_return_object();
+  };
+  std::suspend_always foo;
+  footask taskfun() { co_await foo; }
+};

        Jakub