Merge master r12-8312.devel/c++-coroutines

	* Merge master r12-8312-gb85e79dce149.

1 files changed, 16 insertions, 0 deletions

diff --git a/gcc/testsuite/gdc.test/fail_compilation/must_use_template.d b/gcc/testsuite/gdc.test/fail_compilation/must_use_template.d
new file mode 100644
index 00000000000..eeaa774ea20
--- /dev/null
+++ b/gcc/testsuite/gdc.test/fail_compilation/must_use_template.d
@@ -0,0 +1,16 @@
+/+
+TEST_OUTPUT:
+---
+fail_compilation/must_use_template.d(15): Error: ignored value of `@mustuse` type `must_use_template.S!int`; prepend a `cast(void)` if intentional
+---
++/
+import core.attribute;
+
+@mustuse struct S(T) {}
+
+S!int fun() { return S!int(); }
+
+void test()
+{
+    fun();
+}