Correctly resolve forcibly context allocated parameters in debug-evaluate.

test/mjsunit/regress/regress-325676.js

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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug
 
-Debug = debug.Debug
+// If a function parameter is forced to be context allocated,
+// debug evaluate need to resolve it to a context slot instead of
+// parameter slot on the stack.
 
-var error = null;
-var array = ["a", "b", "c"];
+var Debug = debug.Debug;
+
+var expected;
+var exception = null;
 
 function listener(event, exec_state, event_data, data) {
+  if (event != Debug.DebugEvent.Break) return;
   try {
-    if (event == Debug.DebugEvent.Break) {
-      assertArrayEquals(array,
-                        exec_state.frame(0).evaluate('arguments').value());
-    }
+    assertEquals(expected, exec_state.frame(0).evaluate('arg').value());
+    exec_state.frame(0).evaluate('arg = "evaluated";');
   } catch (e) {
-    error = e;
+    exception = e;
   }
-};
+}
 
 Debug.setListener(listener);
 
+function f(arg) {
+  expected = arg;
+  debugger;
+  assertEquals("evaluated", arg);
 
-function f(a, b) {
-  arguments;
-  debugger;  // Arguments object is already materialized.
+  arg = "value";
+  expected = arg;
+  debugger;
+  assertEquals("evaluated", arg);
+
+  // Forces arg to be context allocated even though a parameter.
+  function g() { arg; }
 }
 
-f.apply(this, array);
-f("a", "b", "c");
-assertNull(error);
+f();
+f(1);
+f(1, 2);
 
-function g(a, b) {
-  debugger;  // Arguments object is not yet materialized.
-}
-g.apply(this, array);
-g("a", "b", "c");
-assertNull(error);
+assertNull(exception);