Don't crash when load eval origin of a call site.

test/mjsunit/regress/regress-crbug-610207.js

Index: test/mjsunit/regress/regress-crbug-610207.js
diff --git a/test/mjsunit/regress/regress-crbug-599067.js b/test/mjsunit/regress/regress-crbug-610207.js
similarity index 54%
copy from test/mjsunit/regress/regress-crbug-599067.js
copy to test/mjsunit/regress/regress-crbug-610207.js
index bc10aa44c2f157c22183263e9602747a3482084b..4396a56a7714f863f2d0fa0ff3d20ae3dbab8906 100644
--- a/test/mjsunit/regress/regress-crbug-599067.js
+++ b/test/mjsunit/regress/regress-crbug-610207.js
@@ -2,10 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+Error.prepareStackTrace = function(exception, frames) {
+  return frames[0].getEvalOrigin();
+}
+
 try {
-  var o = {};
-  var p = new Proxy({}, o);
-  Error.captureStackTrace(p);
+  Realm.eval(0, "throw new Error('boom');");
 } catch(e) {
-  assertEquals("Cannot pass private property name to proxy trap", e.message);
+  print(e.stack);
 }