Crash with ice melting under a campfire

[ExpHP]

Place a campfire on top of ice and light it. After burning for a while at the second stage of fire, the game may crash with the following report. On reloading the world, the ice block that was beneath the fireplace will have become water, suggesting that the ice melting caused the crash.

Full crash log

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---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 3/3/19 5:10 PM
Description: Exception ticking world entities

java.lang.NullPointerException
	at aqp.a(TileEntity.java:259)
	at aab.h(World.java:2107)
	at iz.h(WorldServer.java:554)
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjg.q(IntegratedServer.java:126)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)


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

-- Head --
Stacktrace:
	at aqp.a(TileEntity.java:259)
	at aab.h(World.java:2107)
	at iz.h(WorldServer.java:554)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [jc['ExpHP'/323, l='New World', x=38.16, y=63.00, z=155.75]]
	Chunk stats: ServerChunkCache: 602 Drop: 0
	Level seed: -6195787444608617914
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-72,64,175), Chunk: (at 8,4,15 in -5,10; contains blocks -80,0,160 to -65,255,175), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 6353 game time, 6353 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 172368 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjg.q(IntegratedServer.java:126)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)

-- System Details --
Details:
	Minecraft Version: 1.5.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_31, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 262016496 bytes (249 MB) / 567803904 bytes (541 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms512m -Xmx1024m
	AABB Pool Size: 5732 (320992 bytes; 0 MB) allocated, 5122 (286832 bytes; 0 MB) used
	Suspicious classes: FCBlockFullBlock, FCBlockStone, FCBlockGrass, ...[net.minecraft.Launcher], [org.multimc.EntryPoint, ParseException, Launcher, ...], [org.multimc.onesix.OneSixLauncher]
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1146 (64176 bytes; 0 MB) allocated, 945 (52920 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['ExpHP'/323, l='New World', x=38.16, y=63.00, z=155.75]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated

Tested in 4.B00-b survival with only BTW installed.

[FlowerChild]

Fixed for next release. Thanks for the report.