While attempting to install a guidance chip on a rocket: After sneak-clicking on the Rocket Guidance Computer, clicking the button in the upper left causes the game to crash. This happens with an empty hand or holding the guidance chip.

Steps to reproduce:

• Create 5x5 launch pad with 7-tall tower
• Build a rocket with equipment and layout letter for letter as in the ponder scene (I used hardened glass and the glass itself is one block taller, but I'm trusting this by itself does not matter)
• Link and fuel to full; I used a Thermal fluid cell to the left of the rocket fueling station, resulting in 6k fuel on the rocket, 5k fuel in the fueling station, 11k remaining in the fluid cell
• Sneak-right click on the RGC and click the button in the upper left

That is literally it; everything else appears to work flawlessly. I know others have made it to the moon without issue, so please let me know what other information I can provide.

After further investigation, this is an Optifine issue; removing Optifine allowed me to insert the chip without incident.

This issue can be closed.