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

Time: 2024-05-05 13:24:54
Description: Encountered exception while building chunk meshes

java.lang.NullPointerException: Cannot invoke "net.minecraft.client.renderer.texture.TextureAtlasSprite.m_118367_(double)" because "sprite" is null
at me.jellysquid.mods.sodium.client.render.chunk.compile.pipeline.FluidRenderer.render(FluidRenderer.java:340) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
at me.jellysquid.mods.sodium.client.render.chunk.compile.tasks.ChunkBuilderMeshingTask.execute(ChunkBuilderMeshingTask.java:125) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:mixin,re:classloading,pl:mixin:APP:flywheel.sodium.mixins.json:ChunkBuilderMeshingTaskMixin,pl:mixin:A}
at me.jellysquid.mods.sodium.client.render.chunk.compile.tasks.ChunkBuilderMeshingTask.execute(ChunkBuilderMeshingTask.java:45) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:mixin,re:classloading,pl:mixin:APP:flywheel.sodium.mixins.json:ChunkBuilderMeshingTaskMixin,pl:mixin:A}
at me.jellysquid.mods.sodium.client.render.chunk.compile.executor.ChunkJobTyped.execute(ChunkJobTyped.java:44) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
at me.jellysquid.mods.sodium.client.render.chunk.compile.executor.ChunkBuilder$WorkerRunnable.run(ChunkBuilder.java:186) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
at java.lang.Thread.run(Thread.java:833) ~[?:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at me.jellysquid.mods.sodium.client.render.chunk.compile.pipeline.FluidRenderer.render(FluidRenderer.java:340) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
-- Block being rendered --
Details:
Block: Block{minecraft:lava}[level=0]
Block location: World: (81,141,-403), Section: (at 1,13,13 in 5,8,-26; chunk contains blocks 80,-64,-416 to 95,319,-401), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,-64,-512 to 511,319,-1)
Chunk section: RenderSection at chunk (5, 8, -26) from (80, 128, -416) to (95, 143, -401)
Render context volume: BoundingBox{minX=78, minY=126, minZ=-418, maxX=97, maxY=145, maxZ=-399}
Stacktrace:
at me.jellysquid.mods.sodium.client.render.chunk.compile.tasks.ChunkBuilderMeshingTask.execute(ChunkBuilderMeshingTask.java:125) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:mixin,re:classloading,pl:mixin:APP:flywheel.sodium.mixins.json:ChunkBuilderMeshingTaskMixin,pl:mixin:A}
at me.jellysquid.mods.sodium.client.render.chunk.compile.tasks.ChunkBuilderMeshingTask.execute(ChunkBuilderMeshingTask.java:45) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:mixin,re:classloading,pl:mixin:APP:flywheel.sodium.mixins.json:ChunkBuilderMeshingTaskMixin,pl:mixin:A}
at me.jellysquid.mods.sodium.client.render.chunk.compile.executor.ChunkJobTyped.execute(ChunkJobTyped.java:44) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
at me.jellysquid.mods.sodium.client.render.chunk.compile.executor.ChunkBuilder$WorkerRunnable.run(ChunkBuilder.java:186) ~[rubidium-mc1.20.1-0.7.1.jar%23249!/:?] {re:classloading}
at java.lang.Thread.run(Thread.java:833) ~[?:?] {}

-- Affected level --
Details:
All players: 1 total; [LocalPlayer['Metallicchicken7'/73, l='ClientLevel', x=74.19, y=96.00, z=-240.21]]
Chunk stats: 1024, 432
Level dimension: minecraft:overworld
Level spawn location: World: (0,81,0), Section: (at 0,1,0 in 0,5,0; chunk contains blocks 0,-64,0 to 15,319,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Level time: 468384 game time, 608803 day time
Server brand: forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.ClientLevel.m_6026_(ClientLevel.java:455) ~[client-1.20.1-20230612.114412-srg.jar%23264!/:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:citadel.mixins.json:client.ClientLevelMixin,pl:mixin:APP:rubidium.mixins.json:core.world.biome.ClientWorldMixin,pl:mixin:APP:rubidium.mixins.json:core.world.map.ClientWorldMixin,pl:mixin:APP:rubidium.mixins.json:features.render.world.sky.ClientWorldMixin,pl:mixin:APP:starlight.mixins.json:client.world.ClientLevelMixin,pl:mixin:APP:flywheel.mixins.json:ClientLevelMixin,pl:mixin:APP:architectury.mixins.json:MixinClientLevel,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91354_(Minecraft.java:2319) ~[client-1.20.1-20230612.114412-srg.jar%23264!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:rubidium.mixins.json:core.MinecraftClientMixin,pl:mixin:APP:carryon.mixins.json:MinecraftMixin,pl:mixin:APP:travelerstitles.mixins.json:MinecraftClientTickMixin,pl:mixin:APP:flywheel.mixins.json:PausedPartialTickAccessor,pl:mixin:APP:mixins.irons_spellbooks.json:MinecraftMixin,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:create.mixins.json:client.WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91374_(Minecraft.java:735) ~[client-1.20.1-20230612.114412-srg.jar%23264!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:rubidium.mixins.json:core.MinecraftClientMixin,pl:mixin:APP:carryon.mixins.json:MinecraftMixin,pl:mixin:APP:travelerstitles.mixins.json:MinecraftClientTickMixin,pl:mixin:APP:flywheel.mixins.json:PausedPartialTickAccessor,pl:mixin:APP:mixins.irons_spellbooks.json:MinecraftMixin,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:create.mixins.json:client.WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:218) ~[1.20.1-forge-47.1.0.jar:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:flywheel.mixins.json:ClientMainMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.1.0.jar:?] {}
at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.clientService(CommonLaunchHandler.java:99) ~[fmlloader-1.20.1-47.1.0.jar:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$makeService$0(CommonClientLaunchHandler.java:25) ~[fmlloader-1.20.1-47.1.0.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {}

-- Last reload --
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: vanilla, mod_resources, create:legacy_copper, Moonlight Mods Dynamic Assets

I think the issue is with transparent blocks next to lava sources.
I steps to reproduce:
On a fresh instance of Minecraft, install

• Minecraft 1.20.1
• LWJGL 3.3.1 (installed by default when using multimc)
• Forge 47.3.0 (the current version, as of writing)
• Rubidium 0.7.1 (the current version, as of writing)

Create a new void world. give yourself a transparent block (ex: glass, leaves) and a lava bucket. Place the transparent block, then place a lava source next to it. The lighting will update as if you had placed the lava, but the lava will not appear, and your game should crash with a message similar to the one above.

I just realized this is a duplicate of issue 629.
Which would have been nice to know before I spent all evening debugging it b/c I was having the same issue. :/
Oh well.