Forge 1954 although was happening also with earlier Forge version
Quark-beta-22 also happening with beta-21

Relevant section where the error occurs - http://pastebin.com/ZErJa5LX
Complete forge log - http://pastebin.ubuntu.com/17087013/

Doesn't stop the game loading, doesn't seemingly cause any crashes or anything I just thought you'd like to see error and cleanup if possible.

This is actually morph-o-tool. I copied quark's gradle file and forgot to remove that metadat.

Update that and ChatFlow, whichever you have.