Is there a way to deobfuscate already obfuscated GWT javascript code, that was obfuscated by me?

Question

I want to have a possibility to decode error stacktraces that appear in the production environment.

Answer 1

If you kept your symbolMap around, yes; e.g. check out

http://code.google.com/p/speedtracer/wiki/ResymbolizationProtocol

(disclaimer: never tried it, myself)