diff -r 000000000000 -r 6474c204b198 js/jsd/test/test_evalCached.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/jsd/test/test_evalCached.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+// This test must be run with debugging already enabled
+
+function run_test() {
+    const Cc = Components.classes;
+    const Ci = Components.interfaces;
+    const DebuggerService = Cc["@mozilla.org/js/jsd/debugger-service;1"];
+    const jsdIDebuggerService = Ci.jsdIDebuggerService;
+    var jsd = DebuggerService.getService(jsdIDebuggerService);
+
+    do_check_true(jsd.isOn);
+
+    jsd.scriptHook = {
+        onScriptCreated: function(script) {
+            // Just the presence of this will trigger the script to be handed
+            // to JSD and trigger the crash
+        },
+        onScriptDestroyed: function(script) {
+        }
+    }
+
+    eval("4+4");
+    eval("4+4"); // Will be found in the eval cache
+}