Fix: Global Tag Corruption In Minecraft 1.20.1

Hey everyone! We've got a critical bug report here that's causing some major headaches in Minecraft 1.20.1, specifically when using Forge 47.4.9 and the More Thermal Evaporation Compat mod. If you're experiencing issues with your pickaxes and other tools not working correctly, this is likely the culprit. Let's dive into the details and see how we can get this fixed!

Error Analysis & Technical Root Cause

The core issue lies within the More Thermal Evaporation Compat (v2.0) mod. It's messing with Minecraft's tag loading system. Inside the mod's jar file, the data/minecraft/tags/blocks/mineable/pickaxe.json file has some problems. It's referencing block IDs that either don't exist or have incorrect names. Think of it like a typo in a crucial instruction manual – things are bound to go wrong!

In Minecraft 1.20.1, the TagLoader is super strict. If it finds even one incorrect entry in a tag file, it throws out the whole tag. In this case, it's discarding the #minecraft:mineable/pickaxe tag. This tag is essential because it tells the game which blocks can be mined with a pickaxe. When this tag is missing, it causes a global “mining paralysis.” Suddenly, all pickaxes, even the vanilla ones and those from other mods, lose their mining speed and their ability to drop items. It's like your trusty pickaxe suddenly turned into a butter knife!

This problem highlights how interconnected mods can be and how a small error in one mod can have widespread consequences. The TagLoader is designed to ensure that all the necessary information about blocks and items is loaded correctly, and when it encounters an error, it has to take drastic measures to prevent further issues. This strictness is necessary to maintain the stability of the game, but it also means that mod developers need to be extra careful to ensure that their mods are compatible with each other and with the base game.

The impact of this bug is significant because it affects the core gameplay experience. Players rely on pickaxes to mine resources, build structures, and progress through the game. When pickaxes stop working, it can bring the entire game to a halt. This is why it's so important to identify and fix these kinds of issues as quickly as possible. The cascading failures that result from this bug further compound the problem, making it even more difficult for players to enjoy the game.

Environment Details

Here’s the setup where this bug is happening:

• Minecraft Version: 1.20.1
• Forge Version: 47.4.9
• Mod Version: morethermalevaporationcompat-2.0.jar
• Impacted Environment: Any modpack that includes this compatibility bridge.

Knowing these details helps us narrow down the problem and ensure that the fix is targeted correctly. It's like having the right ingredients for a recipe – you need to know exactly what you're working with to get the desired result. This information is also crucial for mod developers who need to reproduce the bug in their own environment to test their fixes.

Error Logs (Evidence)

Here's a snippet from the error logs that shows the TagLoader freaking out:

These logs are like a detective's notes, giving us clues about what went wrong and where to look for the problem. The TagLoader is telling us that it couldn't load the minecraft:mineable/pickaxe tag because it's missing references to several blocks from the morethermalevaporationcompat mod. This confirms that the issue is indeed related to the mod's tag file and its references to non-existent or incorrectly named blocks.

Cascading Failures (Global Impact)

Because the base pickaxe tag is broken, other modded tags are also failing to load. This means tools from these mods become useless too:

• ProjectE: projecte:mineable/hammer & morning_star
• Mekanism: forge:mineable/paxel
• Tinkers' Construct: tconstruct:mineable/pickadze
• Actually Subtractions: actuallyadditions:mineable/drill

This is like a domino effect, where one problem leads to another. The broken pickaxe tag is the first domino, and it knocks over the tags for other mods, causing their tools to stop working as well. This highlights the importance of fixing the root cause of the problem, rather than just trying to patch up the symptoms. If the base pickaxe tag is fixed, then the other modded tags should load correctly as well.

The cascading failures also demonstrate how interconnected the modding community is. Mods often rely on each other to provide additional functionality or compatibility. When one mod has a bug, it can affect other mods that depend on it. This is why it's so important for mod developers to work together to ensure that their mods are compatible and that any bugs are quickly identified and fixed. The modding community is a collaborative effort, and everyone benefits when mods work well together.

Steps to Reproduce

Want to see the problem for yourself? Here’s how:

1. Install More Thermal Evaporation Compat 2.0 on Forge 47.4.9.
2. Launch the game and try to mine any block that needs a pickaxe (like Stone or Obsidian).
3. Observation: The block mines super slowly (at hand-speed) and doesn't drop anything.

Reproducing the bug is an important step in the debugging process. It allows developers to see the problem firsthand and to test their fixes to ensure that they actually work. It also helps to confirm that the bug is indeed related to the mod and not some other issue. By following these steps, you can verify that the bug is present in your environment and that the fix resolves the problem.

Suggested Fix & Mitigation

To stop the entire tag system from crashing, update your tag JSON entries to use the optional flag. This tells the game that if a block ID is missing, it should just ignore it and move on, instead of throwing an error and breaking everything.

Recommended JSON Structure Example:

{
  "replace": false,
  "values": [
    {
      "id": "morethermalevaporationcompat:vibration_thermal_evaporation_block",
      "required": false
    }
  ]
}

Alternatively, make sure all block IDs are correctly registered before the resource reload phase happens. This might involve checking your mod's initialization code and ensuring that all blocks are properly registered with the game before the tags are loaded. This approach is more complex but can prevent similar issues from occurring in the future.

By using the optional flag, you're essentially telling the game to be more forgiving when loading the tag file. If a block ID is missing, the game will simply ignore it and continue loading the rest of the tag. This prevents the entire tag system from crashing and allows the game to continue running smoothly. This is a simple but effective way to mitigate the issue and prevent the cascading failures that can result from a broken tag.

So, there you have it, folks! A deep dive into the global tag corruption issue in Minecraft 1.20.1 with Forge 47.4.9 and the More Thermal Evaporation Compat mod. Hopefully, this explanation and the suggested fix will help you get your pickaxes working again. Happy mining!