Minecraft Version

1.21.1

Mod Loader

NeoForge

Mod Loader Version

21.1.132

Mod Version

neoforge-1.21-4.1.2.1

Modpack or other Mod

KubeJS 2101.7.1-build.181 used to load the datapack
Rhino 2101.2.7-build.74

Describe the Issue

When a "bucketlib:bucket_filling_shapeless" recipe is present, loading into the world results in an Internal Exception screen. disconnect-2025-03-07_21.16.52-client.txt seems to have the most relevant data about it

Logs

https://gist.github.com/FreeFull/826ff8c957e621d1a151b182685c505f

Do you use any performance-enhancing mods (e.g. OptiFine)?

No

Example recipe that causes it:

{
    "type": "bucketlib:bucket_filling_shapeless",
    "category": "misc",
    "ingredients": [
        {
            "type": "bucketlib:empty"
        },
        {
            "item": "minecraft:oak_sapling"
        }
    ],
    "filling_type": "fluid",
    "fluid": "minecraft:lava"
}

Thanks for your report! I will look into that when I have time :)

@FreeFull Thanks again for your report. I could not reproduce your issue exactly but I found some issues at the recipe serialization that I fixed in the versions 1.21-4.1.2.2 and 1.21.3-4.2.0.6
Could you kindly test my changes? If there are still any issues, please feel free to reopen the issue. Thank you!

Hey, I can confirm that this problem is fully fixed now.

Note: I just now figured out that the recipe I provided should have specified the bucket item, but testing shows that wasn't related to this crash issue anyway.