Minecraft 14w11b Crashes when selecting a World and then trying to play it
*What I expected to happen was...
For the world to load up like normal
*What actually happened was...
It goes to the world generation screen and then crashes
Steps to Reproduce:
1. Start up Minecraft 14w11b
2. Select a world and select play world, or create a world
3. The game crashes
Here's the crash report:
---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!
Time: 16/03/14 1:59 PM
Description: Starting integrated server
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.Gson.fromJson(Gson.java:815)
at com.google.gson.Gson.fromJson(Gson.java:768)
at oy.b(SourceFile:141)
at oy.<init>(SourceFile:43)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:120)
at cek.<init>(SourceFile:34)
at bfr.a(SourceFile:1701)
at bja.e(SourceFile:165)
at bja.a(SourceFile:128)
at biz.a(SourceFile:180)
at biz.d(SourceFile:242)
at biz.k(SourceFile:219)
at bfr.p(SourceFile:1387)
at bfr.ai(SourceFile:801)
at bfr.f(SourceFile:755)
at net.minecraft.client.main.Main.main(SourceFile:121)
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.Gson.fromJson(Gson.java:803)
... 15 more
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at com.google.gson.Gson.fromJson(Gson.java:815)
at com.google.gson.Gson.fromJson(Gson.java:768)
at oy.b(SourceFile:141)
at oy.<init>(SourceFile:43)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:120)
at cek.<init>(SourceFile:34)
-- Starting integrated server --
Details:
Level ID: 1_8 Snapshot
Level Name: 1.8 Showcase
Stacktrace:
at bfr.a(SourceFile:1701)
at bja.e(SourceFile:165)
at bja.a(SourceFile:128)
at biz.a(SourceFile:180)
at biz.d(SourceFile:242)
at biz.k(SourceFile:219)
-- Affected screen --
Details:
Screen name: bjk
Stacktrace:
at bfr.p(SourceFile:1387)
at bfr.ai(SourceFile:801)
at bfr.f(SourceFile:755)
at net.minecraft.client.main.Main.main(SourceFile:121)
-- System Details --
Details:
Minecraft Version: 14w11b
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 56150808 bytes (53 MB) / 96677888 bytes (92 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w11b
LWJGL: 2.9.1
OpenGL: AMD Radeon HD 8610G + 8500M Dual Graphics GL version 4.3.12618 Compatibility Profile Context 13.251.0.0, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Anisotropic Filtering: Off (1)
Related issues
is duplicated by
Attachments
Comments

I attempted to reproduce it and it loaded like normal.
Please zip and attach your world.
Here is a zip folder containing the data for my world (Check the attachments section above)
Unable to reproduce.
Well it happens every time I do it
I made a video for proof: https://www.youtube.com/watch?list=UUn3o_36H0KYrG2DWORpu87Q&v=NJZdfcqyZdE&feature=player_detailpage

Does this happen too if you create a new world ?

Please install the 64 bit version of Java: * When using a 32-bit browser on a 64-bit operating system the automatic version detection will only show the 32-bit version of Java, the 64-bit version needs to be downloaded manually: http://www.java.com/en/download/manual.jsp.
Yes this also happens when creating a new world
Also I downloaded it and my problem still isn't resolved

Does this happen too with an older version (1.7.5 or any 14wXX snapshot) ?
No it only started happening with 14w11b, it hasn't affected any other Minecraft versions

Jim Parley,
did you see any snapshot after 14w11b ?
I didn't.
No 14w11b is the latest on my versions list

The same thing happened to me and I think it has to do with the user profile / server data, try this:
:: For Client ::
copy the save data to the desktop or any other folder you want then delete everything in the location of the game then start Minecraft then move the save data back to the save data folder and that should fix it.
(I only had the problem with the server so this may not work so backup your profile folder first)
:: For Server ::
Delete everything EXCEPT the world folder, the server jar and the start up batch file (if you created one)
(this fixed it for me)
Confirmed.
Fixed in 14w17a.

Fixed in 14w17a.
According to MC-53471 et al not.
It's not fixed, in fact now it's even worse, any version past 1.7.5 will not work for me
This issue is resolved, I had to delete certain info from minecraft in the roaming floder (%appdata%) then delete and re-install the Minecraft launcher
I'm getting this issue-how do I resolve it? I've already reinstalled several times.

Is this still an issue in the current Minecraft Snapshot 15w47c or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Ticket resolved as incomplete, because no answer in a reasonable amount of time (1+ year), if it still happens, please update the ticket.