diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Environment-getVariable-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Environment-getVariable-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+// getVariable sees bindings in let-block scopes.
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var log = '';
+dbg.onDebuggerStatement = function (frame) {
+    log += frame.environment.getVariable("x");
+};
+g.eval("function f() {\n" +
+       "    let x = 'a';\n" +
+       "    debugger;\n" +
+       "    for (let x = 0; x < 2; x++)\n" + 
+       "        if (x === 0)\n" +
+       "            debugger;\n" +
+       "        else {\n" +
+       "            let x = 'b'; debugger;\n" +
+       "        }\n" +
+       "}\n");
+g.f();
+g.eval("let (x = 'c') { debugger; }");
+g.eval("{ let x = 'd'; debugger; }");
+assertEq(log, 'a0bcd');