1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/template/instantiate3.C b/gcc/testsuite/g++.dg/template/instantiate3.C
new file mode 100644
index 000000000..de3d3a084
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/instantiate3.C
@@ -0,0 +1,17 @@
+// { dg-do compile }
+// Origin: Scott Snyder <snyder@fnal.gov>
+
+// PR c++/7639
+// ICE when accessing member with incomplete type.
+
+class ACE_Null_Mutex;	// { dg-error "forward declaration" }
+
+template <class TYPE>
+struct ACE_Cleanup_Adapter
+{
+  TYPE &object ()
+  { return object_; }	// { dg-error "invalid" }
+  TYPE object_;		// { dg-error "incomplete type" }
+};
+
+template class ACE_Cleanup_Adapter<ACE_Null_Mutex>; // { dg-message "instantiated from here" }