Hopper: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-466029/

Crash:

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 12
	at com.google.gson.JsonParser.parse(JsonParser.java:65)
	at bqf.a(SourceFile:62)
	at bqg.a(SourceFile:74)
	at bgj.a(SourceFile:37)
	at bgi.a(SourceFile:86)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgh.a(SourceFile:173)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 16/11/13 10:32 AM
Description: Rendering screen

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 20
	at com.google.gson.JsonParser.parse(JsonParser.java:65)
	at bqf.a(SourceFile:62)
	at bqg.a(SourceFile:74)
	at bgj.a(SourceFile:37)
	at bgi.a(SourceFile:86)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgh.a(SourceFile:173)
	at bll.b(SourceFile:851)
	at azd.ad(SourceFile:780)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 20
	at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1505)
	at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1386)
	at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:531)
	at com.google.gson.stream.JsonReader.peek(JsonReader.java:414)
	at com.google.gson.JsonParser.parse(JsonParser.java:60)
	... 12 more


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

-- Head --
Stacktrace:
	at com.google.gson.JsonParser.parse(JsonParser.java:65)
	at bqf.a(SourceFile:62)
	at bqg.a(SourceFile:74)
	at bgj.a(SourceFile:37)
	at bgi.a(SourceFile:86)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgh.a(SourceFile:173)

-- Screen render details --
Details:
	Screen name: bgh
	Mouse location: Scaled: (312, 202). Absolute: (625, 301)
	Screen size: Scaled: (683, 353). Absolute: (1366, 706). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bje['random869'/19, l='MpServer', x=-556.85, y=65.64, z=163.29]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-587,4,72), Chunk: (at 5,0,8 in -37,4; contains blocks -592,0,64 to -577,255,79), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
	Level time: 229417 game time, 8687 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: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 14 total; [uq['Bat'/0, l='MpServer', x=-555.45, y=59.86, z=192.71], uq['Bat'/1, l='MpServer', x=-550.29, y=56.44, z=182.41], uq['Bat'/2, l='MpServer', x=-548.36, y=56.93, z=174.71], uq['Bat'/3, l='MpServer', x=-546.69, y=59.59, z=179.81], uq['Bat'/4, l='MpServer', x=-538.25, y=70.10, z=175.91], uq['Bat'/5, l='MpServer', x=-514.16, y=59.03, z=203.61], bje['random869'/19, l='MpServer', x=-556.85, y=65.64, z=163.29], uq['Bat'/6, l='MpServer', x=-510.50, y=64.92, z=211.68], uq['Bat'/7, l='MpServer', x=-513.61, y=61.85, z=236.03], uq['Bat'/8, l='MpServer', x=-483.48, y=57.99, z=153.19], uq['Bat'/9, l='MpServer', x=-495.46, y=56.56, z=196.57], uq['Bat'/10, l='MpServer', x=-482.20, y=55.81, z=94.78], uq['Bat'/11, l='MpServer', x=-477.07, y=60.01, z=173.42], uq['Bat'/12, l='MpServer', x=-486.79, y=59.15, z=198.46]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at biz.a(SourceFile:284)
	at azd.b(SourceFile:1951)
	at azd.e(SourceFile:713)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 32283184 bytes (30 MB) / 171331584 bytes (163 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 9251 (518056 bytes; 0 MB) allocated, 4 (224 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.2
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6250 Graphics                                              GL version 4.1.10834 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: ~~ERROR~~ NullPointerException: null
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 251 (14056 bytes; 0 MB) allocated, 57 (3192 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-466029/28520405/