diff -r 000000000000 -r 6474c204b198 js/src/gdb/tests/test-prettyprinters.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/gdb/tests/test-prettyprinters.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+#include "gdb-tests.h"
+
+typedef int A;
+typedef A B;
+
+class C { };
+class D { };
+typedef C C_;
+typedef D D_;
+class E: C, D { };
+typedef E E_;
+class F: C_, D_ { };
+class G { };
+class H: F, G { };
+
+FRAGMENT(prettyprinters, implemented_types) {
+  int i;
+  A a;
+  B b;
+  C c;
+  C_ c_;
+  E e;
+  E_ e_;
+  F f;
+  H h;
+
+  breakpoint();
+
+  (void) i;
+  (void) a;
+  (void) b;
+  (void) c;
+  (void) c_;
+  (void) e;
+  (void) e_;
+  (void) f;
+  (void) h;
+}