Sinhika

A number of things to fix when you branch your 1.15.2 code and try to compile it under 1.16.1:

- Client-side GUI methods all have a new argument in front, MatrixStack. It's passed in from the caller and needs to be
passed to most subordinate methods, including blit(). 
    
-  Use the mapping snapshot for 20200723 or later; before that, the mappings were incomplete in some important areas,
such as client-side GUIs.  
    
- Don't forget to update mods.toml as well as your gradle properties.  
    

Sinhika

A number of things to fix when you branch your 1.15.2 code and try to compile it under 1.16.3:


General

   - Use the mapping snapshot for 20200723 or later; before that, the mappings were incomplete in some important areas, such
as client-side GUIs.
   - Don't forget to update mods.toml as well as your gradle properties
   - The 'license' field is now required in mods.toml.
   - A number of Minecraft class paths were changed (such as the Loot stuff). Your IDE should handle that for you. 

Sinhika

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 2023-07-23 14:49:56
Description: Exception ticking world

org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-0.8.5.jar:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.5.jar:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
	at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.5.jar:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}