[MC-99893] Exception when generating chunk when creating world with one layer. (Caused by not enough heap space)

Making a superflat world with one layer causes an Exception, because there is hardly any heap space:

net.minecraft.util.ReportedException: Exception generating new chunk
at net.minecraft.world.WorldServer.initialize(WorldServer.java:814)
at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:119)
	at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:152)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:527)
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]
Caused by: java.lang.OutOfMemoryError: Java heap space
	at net.minecraft.world.chunk.NibbleArray.<init>(NibbleArray.java:14)	at net.minecraft.world.chunk.storage.ExtendedBlockStorage.<init>(ExtendedBlockStorage.java:42)
	at net.minecraft.world.chunk.Chunk.<init>(Chunk.java:163)
	at net.minecraft.world.gen.ChunkProviderFlat.provideChunk(ChunkProviderFlat.java:150)
	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:130)
	at net.minecraft.world.gen.ChunkProviderServer.provideChunk(ChunkProviderServer.java:160)
	at net.minecraft.world.World.getChunkFromChunkCoords(World.java:346)
	at net.minecraft.world.World.getChunkFromBlockCoords(World.java:335)
	at net.minecraft.world.World.getBlockState(World.java:859)
	at net.minecraft.world.World.isAirBlock(World.java:257)
	at net.minecraft.world.World.getGroundAboveSeaLevel(World.java:239)
	at net.minecraft.world.WorldProvider.canCoordinateBeSpawn(WorldProvider.java:110)
	at net.minecraft.world.WorldServer.createSpawnPosition(WorldServer.java:872)
	at net.minecraft.world.WorldServer.initialize(WorldServer.java:792)
	... 4 more
[11:47:57] [Server thread/ERROR]: This crash report has been saved to: C:\Users\<censored>\AppData\Roaming\.minecraft\crash-reports\crash-2016-03-21_11.47.52-server.txt

I also get another insuffecient heap space error when I try to close down Minecraft:

[11:47:57] [Server thread/INFO]: Stopping server
[11:47:57] [Server thread/INFO]: Saving players
[11:47:57] [Server thread/INFO]: Saving worlds
[11:47:57] [Server thread/INFO]: Saving chunks for level 'Village Finder'/Overworld
Exception in thread "Server thread" java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Unknown Source)
	at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
	at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown Source)
	at java.lang.AbstractStringBuilder.append(Unknown Source)
	at java.lang.StringBuilder.append(Unknown Source)
	at java.lang.StringBuilder.append(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space

Here is the crash report:

---- Minecraft Crash Report ----
// Don't do that.

Time: 3/21/16 11:47 AM
Description: Exception generating new chunk

java.lang.OutOfMemoryError: Java heap space
	at net.minecraft.world.chunk.NibbleArray.<init>(NibbleArray.java:14)
	at net.minecraft.world.chunk.storage.ExtendedBlockStorage.<init>(ExtendedBlockStorage.java:42)
	at net.minecraft.world.chunk.Chunk.<init>(Chunk.java:163)
	at net.minecraft.world.gen.ChunkProviderFlat.provideChunk(ChunkProviderFlat.java:150)
	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:130)
	at net.minecraft.world.gen.ChunkProviderServer.provideChunk(ChunkProviderServer.java:160)
	at net.minecraft.world.World.getChunkFromChunkCoords(World.java:346)
	at net.minecraft.world.World.getChunkFromBlockCoords(World.java:335)
	at net.minecraft.world.World.getBlockState(World.java:859)
	at net.minecraft.world.World.isAirBlock(World.java:257)
	at net.minecraft.world.World.getGroundAboveSeaLevel(World.java:239)
	at net.minecraft.world.WorldProvider.canCoordinateBeSpawn(WorldProvider.java:110)
	at net.minecraft.world.WorldServer.createSpawnPosition(WorldServer.java:872)
	at net.minecraft.world.WorldServer.initialize(WorldServer.java:792)
	at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:119)
	at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:152)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:527)
	at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at net.minecraft.world.chunk.NibbleArray.<init>(NibbleArray.java:14)
	at net.minecraft.world.chunk.storage.ExtendedBlockStorage.<init>(ExtendedBlockStorage.java:42)
	at net.minecraft.world.chunk.Chunk.<init>(Chunk.java:163)
	at net.minecraft.world.gen.ChunkProviderFlat.provideChunk(ChunkProviderFlat.java:150)

-- Chunk to be generated --
Details:
	Location: -3,51
	Position hash: 223338299389
	Generator: FlatLevelSource
Stacktrace:
	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:130)
	at net.minecraft.world.gen.ChunkProviderServer.provideChunk(ChunkProviderServer.java:160)
	at net.minecraft.world.World.getChunkFromChunkCoords(World.java:346)
	at net.minecraft.world.World.getChunkFromBlockCoords(World.java:335)
	at net.minecraft.world.World.getBlockState(World.java:859)
	at net.minecraft.world.World.isAirBlock(World.java:257)
	at net.minecraft.world.World.getGroundAboveSeaLevel(World.java:239)
	at net.minecraft.world.WorldProvider.canCoordinateBeSpawn(WorldProvider.java:110)
	at net.minecraft.world.WorldServer.createSpawnPosition(WorldServer.java:872)

-- Affected level --
Details:
	Level name: Village Finder
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 520 Drop: 0
	Level seed: 6508721325
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 3;minecraft:bedrock;1;village
	Level spawn location: 0.00,0.00,0.00 - World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.world.WorldServer.initialize(WorldServer.java:792)
	at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:119)
	at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:152)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:527)
	at java.lang.Thread.run(Unknown Source)

-- Client Details --
Session ID: token:fa6652af00ba4a46a6ba6daba78f800b:a5b571be309843b7b035f05298422d38
LWJGL Version: 2.9.4
Reloading ResourceManager: Default
Local Player ID: [local:E:dc1f21d2]
Entity ID: 135
Location: X: -1463.722650610396, Y: 83.58051006549411, 
Z: 1920.213808177263
-- System Details --
Details:
	Minecraft Version: 1.9
	Operating System: Windows Vista (x86) version 6.1
	Java Version: 1.8.0_66, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 28248 bytes (0 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and client brand is untouched.