마인크래프트 클라이언트를 만들기 시작해보고 있는데, Client tread 오류가 뜨는데 혹시 왜그런지 아시나요...?
버전은 1.8.8입니다


error:

Exception in thread "Client thread" java.lang.Error: Unresolved compilation problem: 

    Type mismatch: cannot convert from List<Object> to List<T>

    at net.minecraft.util.Cartesian$GetList.apply(Cartesian.java:56)

    at net.minecraft.util.Cartesian$GetList.apply(Cartesian.java:1)

    at com.google.common.collect.Iterators$8.transform(Iterators.java:794)

[18:13:00] [Client Shutdown Thread/INFO]: Stopping server

    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)

    at net.minecraft.block.state.BlockState.<init>(BlockState.java:53)

    at net.minecraft.block.Block.createBlockState(Block.java:1210)

    at net.minecraft.block.Block.<init>(Block.java:296)

    at net.minecraft.block.Block.<init>(Block.java:302)

    at net.minecraft.block.BlockAir.<init>(BlockAir.java:13)

    at net.minecraft.block.Block.registerBlocks(Block.java:1243)

    at net.minecraft.init.Bootstrap.register(Bootstrap.java:517)

    at net.minecraft.client.Minecraft.<init>(Minecraft.java:389)

    at net.minecraft.client.main.Main.main(Main.java:113)

    at Start.main(Start.java:11)