1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testStringLengthNoTinyId.js b/js/src/jit-test/tests/basic/testStringLengthNoTinyId.js
new file mode 100644
index 0000000000..e08f5a697a
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testStringLengthNoTinyId.js
@@ -0,0 +1,64 @@
+// Second testPropagatedFunArgs test -- this is a crash-test.
+(function () {
+  var escapee;
+
+  function testPropagatedFunArgs()
+  {
+    const magic = 42;
+
+    var win = this;
+    var res = [], q = [];
+    function addEventListener(name, func, flag) {
+      q.push(func);
+    }
+
+    var pageInfo = "pageInfo", obs;
+    addEventListener("load", handleLoad, true);
+
+    var observer = {
+      observe: function(win, topic, data) {
+        // obs.removeObserver(observer, "page-info-dialog-loaded");
+        handlePageInfo();
+      }
+    };
+
+    function handleLoad() {
+      //pageInfo = { toString: function() { return "pageInfo"; } };
+      obs = { addObserver: function (obs, topic, data) { obs.observe(win, topic, data); } };
+      obs.addObserver(observer, "page-info-dialog-loaded", false);
+    }
+
+    function handlePageInfo() {
+      res.push(pageInfo);
+      function $(aId) {
+        function notSafe() {
+          return magic;
+        }
+        notSafe();
+        res.push(pageInfo);
+      };
+      var feedTab = $("feedTab");
+    }
+
+    escapee = q[0];
+    return res.join(',');
+  }
+
+  testPropagatedFunArgs();
+
+  escapee();
+})();
+
+function testStringLengthNoTinyId()
+{
+  var x = "unset";
+  var t = new String("");
+  for (var i = 0; i < 5; i++)
+    x = t["-1"];
+
+  var r = "t['-1'] is " + x;
+  t["-1"] = "foo";
+  r += " when unset, '" + t["-1"] + "' when set";
+  return r;
+}
+assertEq(testStringLengthNoTinyId(), "t['-1'] is undefined when unset, 'foo' when set");