Buildcraft version: 7.99.8.1
Forge version: 1.11.2
Link to crashreport or log (on pastebin or gist, please don't put the entire log here) :
Singleplayer/multiplayer: hamachi server

Additional information:

Can you upload the crash report to https://gist.github.com/?

Closing for a lack of information, if you provide the requested information we can re-open and take another look at this.