@Inject(method = "loadChunkFromPacket", at = @At("RETURN"))
private void onLoadChunkFromPacket(int x, int z, BiomeArray biomes, PacketByteBuf buf, CompoundTag heightmaps, int verticalStripBitmask, boolean bl, CallbackInfoReturnable<WorldChunk> ci) {
    if (ConnectionInfo.protocolVersion <= Protocols.V1_12_2) {
        if (ci.getReturnValue() != null) {
            synchronized (LOCK) {
                UpgradeData upgradeData = ChunkUpgrader.fixChunk(ci.getReturnValue());
                ((IUpgradableChunk) ci.getReturnValue()).multiconnect_setClientUpgradeData(upgradeData);
                for (int dx = -1; dx <= 1; dx++) {
                    for (int dz = -1; dz <= 1; dz++) {
                        WorldChunk chunk = getChunk(x + dx, z + dz, ChunkStatus.FULL, false);
                        if (chunk != null)
                            ((IUpgradableChunk) chunk).multiconnect_onNeighborLoaded();
                    }
                }
            }
        }
    }
}
 

@Inject(method = "loadChunkFromPacket", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/chunk/WorldChunk;getSectionArray()[Lnet/minecraft/world/chunk/ChunkSection;"))
private void recalculateHeightmaps(int x, int z, BiomeArray biomeArray, PacketByteBuf buf, CompoundTag tag, int verticalStripMask, boolean bl, CallbackInfoReturnable<WorldChunk> ci) {
    if (ConnectionInfo.protocolVersion <= Protocols.V1_13_2) {
        WorldChunk chunk = this.chunk.get();
        for (ChunkSection section : chunk.getSectionArray()) {
            if (section != null) {
                section.calculateCounts();
            }
        }
        Heightmap.populateHeightmaps(chunk, CLIENT_HEIGHTMAPS);
    }
    this.chunk.set(null);
}
 

@Inject(method = "loadChunkFromPacket", at = @At("RETURN"))
private void onLoadChunkFromPacket(int x, int z, BiomeArray biomeArray, PacketByteBuf buf, CompoundTag heightmaps, int verticalStripMask, boolean bl, CallbackInfoReturnable<WorldChunk> ci) {
    if (ConnectionInfo.protocolVersion <= Protocols.V1_14_4) {
        if (ci.getReturnValue() != null) {
            Biome[] biomeData = PendingBiomeData.getPendingBiomeData(x, z);
            if (biomeData != null) {
                ((IBiomeStorage_1_14_4) ci.getReturnValue()).multiconnect_setBiomeArray_1_14_4(biomeData);
                PendingBiomeData.setPendingBiomeData(x, z, null);
            }
        }
    }
}
 

@Inject(method = "loadChunkFromPacket", at = @At(value = "INVOKE", target = "Lorg/apache/logging/log4j/Logger;warn(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V", ordinal = 0, remap = false), cancellable = true)
private void cancelErrorMessage(int x, int z, BiomeArray biomeArray, PacketByteBuf buf, CompoundTag tag, int verticalStripMask, boolean bl, CallbackInfoReturnable<WorldChunk> ci) {
    if (ConnectionInfo.protocolVersion <= Protocols.V1_13_2 && !PendingChunkDataPackets.isProcessingQueuedPackets())
        ci.setReturnValue(null);
}