1 files changed, 14 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Environment-setVariable-07.js b/js/src/jit-test/tests/debug/Environment-setVariable-07.js
new file mode 100644
index 0000000000..2b58885335
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Environment-setVariable-07.js
@@ -0,0 +1,14 @@
+// setVariable works on let-bindings.
+
+var g = newGlobal({newCompartment: true});
+function test(code, val) {
+    g.eval("function f() { " + code + " }");
+    var dbg = new Debugger(g);
+    dbg.onDebuggerStatement = function (frame) {
+        frame.environment.setVariable("a", val);
+    };
+    assertEq(g.f(), val);
+}
+
+test("let a = 1; debugger; return a;", "xyzzy");
+test("{ let a = 1; debugger; return a; }", "plugh");