steps to what happened

load game-works fine
start game- get to play about 5-10 mintues before it freezes and it goes to minecraft lau

cher with crash.log

1.12.2
14.23.5.2838
7.99.24.2- crashes my world
crash-2019-08-30_23.06.43-server.txt

Just to check: is the spring block disabled in the buildcraft config file? (Main Menu > Mods > BuildCraft > Config > Blocks)

ill take a look and get back to u

yea it works for me thanks