java.lang.AssertionError: TRAP
    at net.minecraft.server.v1_14_R1.ItemStack.checkEmpty(ItemStack.java:109)
    at net.minecraft.server.v1_14_R1.ItemStack.setCount(ItemStack.java:897)
    at net.minecraft.server.v1_14_R1.PlayerInteractManager.a(PlayerInteractManager.java:403)
    at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:1416)
    at net.minecraft.server.v1_14_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:28)
    at net.minecraft.server.v1_14_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:5)
    at net.minecraft.server.v1_14_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:23)
    at net.minecraft.server.v1_14_R1.TickTask.run(SourceFile:18)
    at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136)
    at net.minecraft.server.v1_14_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
    at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109)
    at net.minecraft.server.v1_14_R1.MinecraftServer.aX(MinecraftServer.java:1013)
    at net.minecraft.server.v1_14_R1.MinecraftServer.executeNext(MinecraftServer.java:1006)
    at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119)
    at net.minecraft.server.v1_14_R1.MinecraftServer.sleepForTick(MinecraftServer.java:990)
    at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:923)
    at java.base/java.lang.Thread.run(Thread.java:834)