Fix the debugger for strict-mode functions.

test/mjsunit/debug-scopes.js

Index: test/mjsunit/debug-scopes.js
diff --git a/test/mjsunit/debug-scopes.js b/test/mjsunit/debug-scopes.js
index 40adf5b2d2a3f35b4e92f790144518a3043176c1..b9f9814205ebd7913a50c7bfacf27642b7f280af 100644
--- a/test/mjsunit/debug-scopes.js
+++ b/test/mjsunit/debug-scopes.js
@@ -308,6 +308,24 @@ local_7(1, 2);
 EndTest();
 
 
+// Simple empty local scope but for a strict-mode function where the
+// receiver is undefined.
+BeginTest("Local 8");
+
+function local_8() {
+  "use strict";
+  debugger;
+}
+
+listener_delegate = function(exec_state) {
+  CheckScopeChain([debug.ScopeType.Local,
+                   debug.ScopeType.Global], exec_state);
+  CheckScopeContent({}, 0, exec_state);
+};
+local_8();
+EndTest();
+
+
 // Single empty with block.
 BeginTest("With 1");