Correct handling of exceptions occured during getting of exception stack trace.

test/mjsunit/regress/regress-444805.js-script

Index: test/mjsunit/regress/regress-444805.js-script
diff --git a/test/mjsunit/regress/regress-444805.js-script b/test/mjsunit/regress/regress-444805.js-script
new file mode 100644
index 0000000000000000000000000000000000000000..17b233b5613fcf1d71c8f7e77ab42d9f5a0bdcf1
--- /dev/null
+++ b/test/mjsunit/regress/regress-444805.js-script
@@ -0,0 +1,11 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+Error.prepareStackTrace = function(dummyObject, v8StackTrace)
+{
+  throw new Error('boom');
+};
+
+
+throw new Error('just error');