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Crash due to NaN physics when ropes desync after chunk reload #442

@Matseri1

Description

@Matseri1

Context

I was using Create Aeronautics to build a small flying contraption (balloon-like structure) attached with ropes to a base and another structure over water.

After moving far away and unloading chunks, when I came back:

  • the flying contraption appeared at water level instead of in the air
  • ropes were visually and physically stuck inside blocks and inside the balloon

I tried to fix it by breaking a few blocks in the balloon structure.

After breaking blocks, the game instantly closed (no crash report generated).

From logs:
"Invalid position (NaN NaN NaN)"

This seems to indicate a physics issue where the rope connections enter an invalid state after chunk reload.

  • Minecraft 1.21.1
  • Create 6.0.10
  • Create Aeronautics 1.1.3
  • Sable 1.1.3
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https://mclo.gs/kM67New

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type: crashSomething crashes my game

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