The bug
The ender dragon makes its breath attack at the highest block of the portal. This can cause MC-88301, but also a crash when you just build a tower of blocks on the portal. Then the ender dragon tries to fly to the top of the power and probably because it unloads itself, the game crashes.
How to reproduce
Go to the end
Place a about 200 block high tower on top of the portal
Go to the ground
Wait until the ender dragon flies upwards to the highest point
Crash report
1.11.2\: [^crash-2017-06-04_15.26.26-server.txt]
Description: Ticking entity
java.lang.ArrayIndexOutOfBoundsException: 1
at bbd.f(SourceFile:74)
at yq.k(SourceFile:68)
at yq.j(SourceFile:63)
at yq.c(SourceFile:24)
at yb.n(SourceFile:246)
at sw.A_(SourceFile:1703)
at sx.A_(SourceFile:282)
at ajs.a(SourceFile:1517)
at lw.a(SourceFile:718)
at ajs.h(SourceFile:1495)
at ajs.k(SourceFile:1378)
at lw.k(SourceFile:551)
at net.minecraft.server.MinecraftServer.D(SourceFile:634)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at cch.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
at java.lang.Thread.run(Thread.java:745)Linked issues
is duplicated by 8
MC-85221
Dragon Pausing over portal at different heights
Resolved
MC-91637
end exit portal + pillar + ender dragon = 15w44a crash
Resolved
MC-103572
Enderdragon posing over 255 cause a crash
Resolved
MC-117287
Building Tall Tower at 0,0 in the End causes Ender Dragon pathing issues
Resolved
MC-118619
Ender dragon crashes when building above the exit portal
Resolved
relates to 3
MC-207174
When blocks are placed above the End altar, the Ender Dragon comes to rest on top of said blocks rather than on top of the altar
Open
MC-88371
Ender Dragon flies down in the void when the exit portal is destroyed
Reopened
MC-88301
Ender Dragon Breath freezes server when under or above the world
Resolved
Attachments
Comments 21
Confirmed for 15w42a
Confirmed for 15w43a
Confirmed for 15w44a
Confirmed for 15w46a
11 more comments
Confirmed for 16w14a
Confirmed for 1.9.3-pre3.
---- Minecraft Crash Report ----
// Why did you do that?
Time: 2016/5/3 下午 10:00
Description: Ticking entity
java.lang.ArrayIndexOutOfBoundsException: 1
at ayp.f(SourceFile:71)
at xj.k(SourceFile:68)
at xj.j(SourceFile:63)
at xj.c(SourceFile:24)
at wu.n(SourceFile:238)
at sa.m(SourceFile:1619)
at sb.m(SourceFile:277)
at aht.a(SourceFile:1517)
at lq.a(SourceFile:717)
at aht.g(SourceFile:1495)
at aht.k(SourceFile:1385)
at lq.k(SourceFile:550)
at net.minecraft.server.MinecraftServer.D(SourceFile:626)
at net.minecraft.server.MinecraftServer.C(SourceFile:554)
at byl.C(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:458)
at java.lang.Thread.run(Thread.java:745)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Server thread
Stacktrace:
at ayp.f(SourceFile:71)
at xj.k(SourceFile:68)
at xj.j(SourceFile:63)
at xj.c(SourceFile:24)
at wu.n(SourceFile:238)
at sa.m(SourceFile:1619)
at sb.m(SourceFile:277)
at aht.a(SourceFile:1517)
at lq.a(SourceFile:717)
at aht.g(SourceFile:1495)
-- Entity being ticked --
Details:
Entity Type: EnderDragon (wu)
Entity ID: 7551824
Entity Name: 終界龍
Entity's Exact location: -0.47, 255.98, -0.45
Entity's Block location: World: (-1,255,-1), Chunk: (at 15,15,15 in -1,-1; contains blocks -16,0,-16 to -1,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Entity's Momentum: 0.80, 1.48, -0.07
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at aht.k(SourceFile:1385)
at lq.k(SourceFile:550)
-- Affected level --
Details:
Level name: 1
All players: 1 total; [ls['Les3awe'/7551823, l='1', x=-9.68, y=255.00, z=0.38]]
Chunk stats: ServerChunkCache: 1089 Drop: 0
Level seed: 7465166348844330209
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 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: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:626)
at net.minecraft.server.MinecraftServer.C(SourceFile:554)
at byl.C(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:458)
at java.lang.Thread.run(Thread.java:745)
-- System Details --
Details:
Minecraft Version: 1.9.3-pre3
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 266373856 bytes (254 MB) / 751394816 bytes (716 MB) up to 4253024256 bytes (4056 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn400M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [ls['Les3awe'/7551823, l='1', x=-9.68, y=255.00, z=0.38]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.Is this still an issue in the latest snapshot 16w44a? If so please update the affected versions.
This is an automated comment on any open or reopened issue with out-of-date affected versions.
Confirmed for 1.11.1
---- Minecraft Crash Report ----
// But it works on my machine.
Time: 12/21/16 12:10 AM
Description: Ticking entity
java.lang.ArrayIndexOutOfBoundsException: 1
at bbd.f(SourceFile:74)
at yq.k(SourceFile:68)
at yq.j(SourceFile:63)
at yq.c(SourceFile:24)
at yb.n(SourceFile:246)
at sw.A_(SourceFile:1703)
at sx.A_(SourceFile:282)
at ajs.a(SourceFile:1517)
at lw.a(SourceFile:718)
at ajs.h(SourceFile:1495)
at ajs.k(SourceFile:1378)
at lw.k(SourceFile:551)
at net.minecraft.server.MinecraftServer.D(SourceFile:634)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at cch.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
at java.lang.Thread.run(Thread.java:745)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Server thread
Stacktrace:
at bbd.f(SourceFile:74)
at yq.k(SourceFile:68)
at yq.j(SourceFile:63)
at yq.c(SourceFile:24)
at yb.n(SourceFile:246)
at sw.A_(SourceFile:1703)
at sx.A_(SourceFile:282)
at ajs.a(SourceFile:1517)
at lw.a(SourceFile:718)
at ajs.h(SourceFile:1495)
-- Entity being ticked --
Details:
Entity Type: minecraft:ender_dragon (yb)
Entity ID: 6246408
Entity Name: Ender Dragon
Entity's Exact location: -0.18, 256.45, 0.76
Entity's Block location: World: (-1,256,0), Chunk: (at 15,16,0 in -1,0; contains blocks -16,0,0 to -1,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: 0.84, 0.24, -0.46
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at ajs.k(SourceFile:1378)
at lw.k(SourceFile:551)
-- Affected level --
Details:
Level name: New World
All players: 1 total; [ly['ThgilFoDrol'/97112, l='New World', x=-4.30, y=257.69, z=-11.15]]
Chunk stats: ServerChunkCache: 289 Drop: 0
Level seed: -9072368465396243415
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 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: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.server.MinecraftServer.D(SourceFile:634)
at net.minecraft.server.MinecraftServer.C(SourceFile:562)
at cch.C(SourceFile:154)
at net.minecraft.server.MinecraftServer.run(SourceFile:466)
at java.lang.Thread.run(Thread.java:745)
-- System Details --
Details:
Minecraft Version: 1.11.1
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 410042968 bytes (391 MB) / 656240640 bytes (625 MB) up to 1597243392 bytes (1523 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1536m -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [ly['ThgilFoDrol'/97112, l='New World', x=-4.30, y=257.69, z=-11.15]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.confirmed for 1.12
[media]
Working fix for this issue. Decompiled using MCP 9.40-Pre1 in the class net.minecraft.pathfinding (Note that this fix isnt perfect!)
public Vec3d getCurrentPos()
{
System.out.println("currentPathIndex: " + this.currentPathIndex);
//Start of the fix
PathPoint pathpoint = null;
try {
pathpoint = this.points[this.currentPathIndex];
} catch (Exception e) {
pathpoint = new PathPoint(0, 0, 0);
}
//end of the fix
return new Vec3d((double)pathpoint.xCoord, (double)pathpoint.yCoord, (double)pathpoint.zCoord);
}Shouldn't this rather be solved without exception handling and just testing if currentPathIndex < points.length?
[media]
confirmed for 1.12.1
Confirmed for 17w50a
Confirmed for 1.13.1.
I thought this was intentional
confirmed for 1.14.2 pre relase 1
no resolved
reopenned
@@unknown, the crash appears to be fixed, but the dragon still flies to the highest point (which can be 0 or 255) in 1.14.2-pre2.
Should MC-88371 be about that and was only the crash fixed?
The crash is fixed but the dragon still flies up,
migrated
Can confirm.