Buildcraft version: 7.99.7
Forge version: 13.20.1.2513
Link to crashreport or log (on pastebin or gist, please don't put the entire log here) :
Singleplayer/multiplayer: SinglePlayer

Additional information:
Only mod is Build Craft, no rendering. It shows an error in the name I believe.
!
2017-10-22_17 04 56

This still happens in 7.99.8 too btw (With Gel)

The gel too..
(Tried using the Debugger [Watever dat is..] and nothing happened.