diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Environment-getVariable-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Environment-getVariable-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// Environment.prototype.getVariable does not see variables bound in enclosing scopes.
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    assertEq(frame.environment.getVariable("x"), 13);
+    assertEq(frame.environment.getVariable("k"), undefined);
+    assertEq(frame.environment.find("k").getVariable("k"), 3);
+    hits++;
+};
+g.eval("var k = 3; function f(x) { debugger; }");
+g.f(13);
+assertEq(hits, 1);