Minor If a player skull is placed in the world, and then water flows over it, it will crash the server.
[15:23:11 ERROR]: Encountered an unexpected exception net.minecraft.server.v1_9_R1.ReportedException: Exception while ticking a block at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:787) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45] Caused by: java.lang.NullPointerException at net.minecraft.server.v1_9_R1.BlockSkull.dropNaturally(BlockSkull.java:96) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.Block.b(Block.java:300) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.BlockFlowing.flow(BlockFlowing.java:158) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.BlockFlowing.b(BlockFlowing.java:114) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.WorldServer.a(WorldServer.java:734) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.WorldServer.doTick(WorldServer.java:248) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:776) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] ... 4 more [15:23:11 ERROR]: Cause of unexpected exception was java.lang.NullPointerException at net.minecraft.server.v1_9_R1.BlockSkull.dropNaturally(BlockSkull.java:96) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.Block.b(Block.java:300) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.BlockFlowing.flow(BlockFlowing.java:158) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.BlockFlowing.b(BlockFlowing.java:114) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.WorldServer.a(WorldServer.java:734) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.WorldServer.doTick(WorldServer.java:248) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:776) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) ~[spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot-1.9.2-R0.1-SNAPSHOT.jar:git-Spigot-944aa20-8d16fc0] at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
The offending code is here:
// CraftBukkit start - Special case dropping so we can get info from the tile entity @Override public void dropNaturally(World world, BlockPosition blockposition, IBlockData iblockdata, float f, int i) { if (world.random.nextFloat() < f) { TileEntitySkull tileentityskull = (TileEntitySkull) world.getTileEntity(blockposition); ItemStack itemstack = this.a(world, blockposition, iblockdata); if (tileentityskull.getSkullType() == 3 && tileentityskull.getGameProfile() != null) { itemstack.setTag(new NBTTagCompound()); NBTTagCompound nbttagcompound = new NBTTagCompound(); GameProfileSerializer.serialize(nbttagcompound, tileentityskull.getGameProfile()); itemstack.getTag().set("SkullOwner", nbttagcompound); } a(world, blockposition, itemstack); } } // CraftBukkit end
Matching up line numbers, the implication is that "tileentityskull" is null, though I'm not sure why. I don't have a fix (yet?)
