diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Environment-getVariable-12.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Environment-getVariable-12.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+var g = newGlobal();
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    hits++;
+    assertEq(frame.environment.parent.getVariable('y'), true);
+};
+
+g.eval("var g;" +
+       "function f(x) {" +
+       "  let (y = x) {" +
+       "    if (x)" +
+       "      g = function() { eval('debugger') };" +
+       "    else" +
+       "      g();" +
+       "  }" +
+       "}" +
+       "f(true);" +
+       "f(false);");
+assertEq(hits, 1);
+
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    hits++;
+    assertEq(frame.environment.parent.getVariable('y'), 1);
+    assertEq(frame.environment.parent.names().indexOf('z'), -1);
+};
+
+g.eval("var g;" +
+       "let (y = 1) {" +
+       "  g = function () { debugger; };" +
+       "  let (z = 2) {" +
+       "    g();" +
+       "  }"+
+       "}");
+assertEq(hits, 1);
+
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    hits++;
+    var e = frame.older.environment.parent;
+    assertEq(e.getVariable('z'), true);
+    e = e.parent;
+    assertEq(e.getVariable('y'), true);
+};
+
+g.eval("var g;" +
+       "function h() { debugger };" +
+       "for (var x of [true, false]) {" +
+       "  let (y = x) {" +
+       "    let (z = x) {" +
+       "      if (x)" +
+       "        g = function () { print(z); h() };" +
+       "      else" +
+       "        g();" +
+       "    }" +
+       "  }" +
+       "}");
+assertEq(hits, 1);