testsuite: Add testcase for already fixed PR [PR102489]

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

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

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

diff --git a/gcc/testsuite/g++.dg/coroutines/pr102489.C b/gcc/testsuite/g++.dg/coroutines/pr102489.C
new file mode 100644 (file)
index 0000000..0ef06da
--- /dev/null
+++ b/gcc/testsuite/g++.dg/coroutines/pr102489.C
@@ -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; }
+};