Add test from PR9026.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124034 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/crashes.cpp b/test/SemaCXX/crashes.cpp
index 9b0f19e..c75b040 100644
--- a/test/SemaCXX/crashes.cpp
+++ b/test/SemaCXX/crashes.cpp
@@ -75,5 +75,23 @@
       yyy = sizeof(struct foo*)
     };
     foo *xxx();
-};
+  };
+}
+
+namespace PR9026 {
+  class InfallibleTArray {
+  };
+  class Variant;
+  class CompVariant {
+    operator const InfallibleTArray&() const;
+  };
+  class Variant {
+    operator const CompVariant&() const;
+  };
+  void     Write(const Variant& __v);
+  void     Write(const InfallibleTArray& __v);
+  Variant x;
+  void Write2() {
+    Write(x);
+  }
 }