--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/Wattributes-4.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,29 @@
+// PR c++/83322 - ICE: tree check: expected class ‘type’, have ‘exceptional’
+// (baselink) in diag_attr_exclusions, at attribs.c:393
+// { dg-do compile }
+// { dg-options "-Wattributes" }
+
+#define ATTR(list) __attribute__ (list)
+
+// Test case from comment #0.
+struct A0
+{
+  template <class T> operator T();
+  ATTR ((always_inline)) operator int();
+};
+
+// Test case from comment #4.
+struct A1
+{
+  void foo();
+};
+
+struct B
+{
+  bool foo;
+};
+
+struct C: A1, B
+{
+  ATTR ((warn_unused_result)) int foo ();
+};