Create Train Crash Fix

The author traced the crash to the train data file that Create writes to disk. Trains with invalid positions were serialised into that file, and loading them later brought the server down. The fix works by adding two mixin injections, which correct the position data during the read step, so the affected trains load safely.

Careful checking showed that the NBT values written for the tracks were already NaN before the file was saved, which points to a problem in how positions were serialised. The author noted that the tracks data file itself contained nothing unusual, and the fix was placed at the readNbt call inside Create's train entity code instead. A later proposal in the Create project followed a similar approach, and the final version of this mod is the one that was added.

The mod requires Create Fabric and runs only on the server. Players joining a server that uses it do not need to install anything. Files are published for Fabric and Quilt for Minecraft 1.20.1, and the code is open source under the GNU Affero General Public License v3.0 only.