Buildcraft version: buildcraft-7.99.13-pre9.jar
Forge version: 14.23.1.2562
Link to crashreport or log (on pastebin or gist, please don't put the entire log here) :
Multiplayer (client crashes server does not) https://pastebin.com/iFPLPac4:

Additional information:

Crashes when shift + left clicking a planet ID into an assembled rockets guidance system, does not happen if you drag the planet ID.

does this still heapen? did this get reported to the advanced rocketry devs as well?

might be related to #3953