diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Environment-find-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Environment-find-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// env.find() finds nonenumerable names in the global environment.
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var hits = 0;
+g.h = function () {
+    var env = dbg.getNewestFrame().environment;
+    var last = env;
+    while (last.parent)
+        last = last.parent;
+
+    assertEq(env.find("Array"), last);
+    hits++;
+};
+
+g.eval("h();");
+g.eval("(function () { let (x = 1, y = 2) h(); })();");
+assertEq(hits, 2);