java.util.ConcurrentModificationException:
at java.util.HashMap$HashIterator.nextNode(-1)
at java.util.HashMap$ValueIterator.next(-1)
at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(MapGenStructure.java:89)
at net.minecraft.world.gen.ChunkProviderFlat.func_73153_a(SourceFile:132)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147465_d(World.java:436)
at factorization.common.WorldgenManager$2.set(WorldgenManager.java:79)
at factorization.common.WorldgenManager$2.dob(WorldgenManager.java:101)
at factorization.common.WorldgenManager$2.generation_implementation(WorldgenManager.java:187)
at factorization.common.WorldgenManager$2.doGeneration(WorldgenManager.java:133)
at factorization.common.WorldgenManager$2.generate(WorldgenManager.java:96)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_72938_d(World.java:414)
at net.minecraft.world.World.func_72825_h(World.java:1742)
at mariculture.core.handlers.WorldGenHandler.generateOyster(WorldGenHandler.java:76)
at mariculture.core.handlers.WorldGenHandler.generateSurface(WorldGenHandler.java:38)
at mariculture.core.handlers.WorldGenHandler.generate(WorldGenHandler.java:27)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1040)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at factorization.common.WorldgenManager$2.clear(WorldgenManager.java:83)
at factorization.common.WorldgenManager$2.generation_implementation(WorldgenManager.java:212)
at factorization.common.WorldgenManager$2.doGeneration(WorldgenManager.java:133)
at factorization.common.WorldgenManager$2.generate(WorldgenManager.java:96)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at factorization.common.WorldgenManager$2.clear(WorldgenManager.java:83)
at factorization.common.WorldgenManager$2.generation_implementation(WorldgenManager.java:212)
at factorization.common.WorldgenManager$2.doGeneration(WorldgenManager.java:133)
at factorization.common.WorldgenManager$2.generate(WorldgenManager.java:96)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at plantmegapack.worldgen.PMPSpawnLocation.getBlockInfo(PMPSpawnLocation.java:1423)
at plantmegapack.worldgen.PMPGenBase.spawnPlantCluster(PMPGenBase.java:78)
at plantmegapack.worldgen.PMPWorldGenerator.generateSurface(PMPWorldGenerator.java:99)
at plantmegapack.worldgen.PMPWorldGenerator.generate(PMPWorldGenerator.java:46)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at factorization.common.WorldgenManager$2.clear(WorldgenManager.java:83)
at factorization.common.WorldgenManager$2.generation_implementation(WorldgenManager.java:212)
at factorization.common.WorldgenManager$2.doGeneration(WorldgenManager.java:133)
at factorization.common.WorldgenManager$2.generate(WorldgenManager.java:96)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at plantmegapack.worldgen.PMPSpawnLocation.getBlockInfo(PMPSpawnLocation.java:1423)
at plantmegapack.worldgen.PMPGenBase.spawnPlantCluster(PMPGenBase.java:78)
at plantmegapack.worldgen.PMPWorldGenerator.generateSurface(PMPWorldGenerator.java:99)
at plantmegapack.worldgen.PMPWorldGenerator.generate(PMPWorldGenerator.java:46)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1045)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at factorization.common.WorldgenManager$2.clear(WorldgenManager.java:83)
at factorization.common.WorldgenManager$2.generation_implementation(WorldgenManager.java:212)
at factorization.common.WorldgenManager$2.doGeneration(WorldgenManager.java:133)
at factorization.common.WorldgenManager$2.generate(WorldgenManager.java:96)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:280)
at fastcraft.a.c.a(F:84)
at fastcraft.Hooks.r(F:139)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:265)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:78)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:92)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)