Do not materialize context-allocated values for debug-evaluate.

test/mjsunit/debug-evaluate-closure.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug --allow-natives-syntax
 
 Debug = debug.Debug;
 var listened = false;
 
 function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Exception) {
-    for (var i = 0; i < exec_state.frameCount(); i++) {
-      print(exec_state.frame(i).receiver());
-      print(exec_state.frame(i).func().name());
-    }
+  if (event != Debug.DebugEvent.Break) return;
+  try {
+    assertEquals("bar return", exec_state.frame(0).evaluate("bar()").value());
+    assertEquals("inner bar", exec_state.frame(0).evaluate("inner").value());
+    assertEquals("outer bar", exec_state.frame(0).evaluate("outer").value());
+    assertEquals("baz inner", exec_state.frame(0).evaluate("baz").value());
+    assertEquals("baz outer", exec_state.frame(1).evaluate("baz").value());
+    exec_state.frame(0).evaluate("w = 'w foo'").value();
+    exec_state.frame(0).evaluate("inner = 'inner foo'").value();
+    exec_state.frame(0).evaluate("outer = 'outer foo'").value();
+    exec_state.frame(0).evaluate("baz = 'baz inner foo'").value();
+    exec_state.frame(1).evaluate("baz = 'baz outer foo'").value();
+  } catch (e) {
+    print(e);
+    print(e.stack);
   }
   listened = true;
 }
 
 Debug.setListener(listener);
-Debug.setBreakOnException();
 
-assertThrows(function() { delete null['foo']; });
+var outer = "outer";
+var baz = "baz outer"
 
-Debug.clearBreakOnException();
+function foo() {
+  var inner = "inner";
+  var baz = "baz inner";
+  var withw = { w: "w" };
+  var withv = { v: "v" };
+
+  with (withv) {
+    var bar = function bar() {
+      inner = "inner bar";
+      outer = "outer bar";
+      v = "v bar";
+      return "bar return";
+    };
+  }
+
+  with (withw) {
+    debugger;
+  }
+
+  assertEquals("inner foo", inner);
+  assertEquals("baz inner foo", baz);
+  assertEquals("w foo", withw.w);
+  assertEquals("v bar", withv.v);
+}
+
+foo();
+assertEquals("outer foo", outer);
+assertEquals("baz outer foo", baz);
+assertTrue(listened);
 Debug.setListener(null);
-
-assertTrue(listened);
-