Use Bed Packet causes FieldAccessException

[fynntimes]

Here is my code for sending a PacketType.Play.Server.BED packet:

private static void playSleepAnimation(Player p) {
        PacketContainer container = manager.createPacket(PacketType.Play.Server.BED);
        int x = (int) p.getLocation().getX();
        int y = (int) p.getLocation().getY();
        int z = (int) p.getLocation().getZ();
        container.getIntegers()
                .write(0, p.getEntityId());
        container.getBlockPositionModifier().write(1, new BlockPosition(x, y, z));
        sendToAll(container);
    }

For some reason, I get this error in console:

[20:02:25 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'corpse' in plugin Apocalypse v1.0-SNAPSHOT
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerConnection.java:1133) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:968) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_40]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_40]
    at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot_server.jar:git-Spigot-dbe012b-61ef214]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_40]
**Caused by: com.comphenix.protocol.reflect.FieldAccessException: Field index out of bounds. (Index: 1, Size: 1)**
    at com.comphenix.protocol.reflect.StructureModifier.writeInternal(StructureModifier.java:336) ~[?:?]
    at com.comphenix.protocol.reflect.StructureModifier.write(StructureModifier.java:312) ~[?:?]
    at com.theapocalypsemc.apocalypse.entities.CorpseUtil.playSleepAnimation(CorpseUtil.java:46) ~[?:?]
    at com.theapocalypsemc.apocalypse.entities.CorpseUtil.createCorpse(CorpseUtil.java:29) ~[?:?]
    at com.theapocalypsemc.apocalypse.Apocalypse.onCommand(Apocalypse.java:51) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot_server.jar:git-Spigot-dbe012b-61ef214]
    ... 15 more

I get a FieldAccessException, saying my field index is out of bounds. However, I checked the server code and according to that, field index 0 is an integer, and field index 1 is a BlockPosition. Currently using 3.6.3-SNAPSHOT on Spigot v1.8.3-R0.1-SNAPSHOT.

[dmulloy2]

The index is relative to the type, so you should use the index 0 instead of 1.

[fynntimes]

That fixed it. Thank you.