In those cases, you could make them function correctly by replacing '\\' with a single '\' fixes the problem.
This bug has been corrected in any future decodings see examples here and here.
In some Adobe products, Adobe uses a modified version of the open source SpiderMonkey code. Use of that source is subject to the Mozilla Public License Version 1.1 (the License). You may obtain a copy of the License on the Mozilla website or in the download files.
However, read on and you will see "Download files - Coming soon!". There goes that plan! Anyone at Adobe care to comment on when they plan to release this code?