1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-arguments-07.js b/js/src/jit-test/tests/debug/Frame-arguments-07.js
new file mode 100644
index 0000000000..a73e4e97ed
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-arguments-07.js
@@ -0,0 +1,24 @@
+// When argument[x] is assigned, where x > callee.length, frame.arguments reflects the change.
+
+var g = newGlobal({newCompartment: true});
+g.eval("function f(a, b) {\n" +
+       "    for (var i = 0; i < arguments.length; i++)\n" +
+       "        arguments[i] = i;\n" +
+       "    eval(\"\");\n" +
+       "    debugger;\n" +
+       "}\n");
+
+var dbg = Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    var argc = frame.eval("arguments.length").return;
+    var args = frame.arguments;
+    assertEq(args.length, argc);
+    for (var i = 0; i < argc; i++)
+        assertEq(args[i], i);
+    hits++;
+}
+
+g.f(9);
+g.f(9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9);
+assertEq(hits, 2);