Recently I got a crash like this:
02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PacketPlayInFlying.a(SourceFile:126) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:598) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PlayerList.d(PlayerList.java:372) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PlayerChunkMap.movePlayer(PlayerChunkMap.java:349) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PlayerChunkMap.c(PlayerChunkMap.java:220) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.PlayerChunk.<init>(PlayerChunk.java:40) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:134) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:199) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.Chunk.loadNearby(Chunk.java:909) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.Chunk.a(Chunk.java:929) 02.03 16:08:27 [Server] ERROR org.bukkit.craftbukkit.v1_9_R1.generator.NormalChunkGenerator.recreateStructures(NormalChunkGenerator.java:41) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.ChunkProviderGenerate.recreateStructures(SourceFile:473) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.BiomeForest.a(SourceFile:82) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.BiomeForest.b(SourceFile:105) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.WorldGenForestTree.generate(WorldGenForestTree.java:91) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.WorldGenForestTree.a(WorldGenForestTree.java:174) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.WorldGenerator.a(SourceFile:31) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.World.setTypeAndData(World.java:368) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.World.notifyAndUpdatePhysics(World.java:380) 02.03 16:08:27 [Server] ERROR net.minecraft.server.v1_9_R1.World.notify(World.java:418) 02.03 16:08:27 [Server] ERROR Stack: 02.03 16:08:27 [Server] ERROR PID: 15 | Suspended: false | Native: false | State: RUNNABLE 02.03 16:08:27 [Server] ERROR Current Thread: Server thread 02.03 16:08:27 [Server] ERROR ------------------------------ 02.03 16:08:27 [Server] ERROR Server thread dump (Look for plugins here before reporting to Spigot!): 02.03 16:08:27 [Server] ERROR ------------------------------ 02.03 16:08:27 [Server] ERROR Spigot version: git-Spigot-7d15d07-c194444 (MC: 1.9)