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Was working for 1 and a half fine and then started crashing.

This is latest crash report:

[16:48:02] [Client thread/INFO]: Setting user: BrandonBuster
[16:48:02] [Client thread/INFO]: (Session ID is token:52b3240bfd9c48f0bfd673daa8e76696:691a6a4c54fa43a0b7ec9ea6084594c1)
[16:48:04] [Client thread/INFO]: LWJGL Version: 2.9.4
[16:48:04] [Client thread/INFO]: Reloading ResourceManager: Default
[16:48:05] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:48:05] [Thread-6/INFO]: Initializing LWJGL OpenAL
[16:48:05] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[16:48:05] [Thread-6/INFO]: OpenAL initialized.
[16:48:06] [Sound Library Loader/INFO]: Sound engine started
[16:48:08] [Client thread/INFO]: Created: 512x512 textures-atlas
[16:48:54] [Server thread/INFO]: Starting integrated minecraft server version 1.8.8
[16:48:54] [Server thread/INFO]: Generating keypair
[16:48:55] [Server thread/INFO]: Preparing start region for level 0
[16:48:56] [Server thread/INFO]: Preparing spawn area: 68%
[16:48:56] [Server thread/INFO]: Changing view distance to 11, from 10
[16:48:56] [Server thread/INFO]: BrandonBuster[local:E:70bdd8dd] logged in with entity id 284 at (236.02024722656844, 70.0, 429.93912287614626)
[16:48:57] [Server thread/INFO]: BrandonBuster joined the game
[16:48:59] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25]
at g.a(SourceFile:45) [1.8.8.jar:?]
at ave.av(SourceFile:881) [1.8.8.jar:?]
at ave.a(SourceFile:325) [1.8.8.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.8.jar:?]
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) ~[?:1.8.0_25]
at java.util.HashMap$KeyIterator.next(HashMap.java:1453) ~[?:1.8.0_25]
at ne.<init>(SourceFile:23) ~[1.8.8.jar:?]
at amy.<init>(SourceFile:80) ~[1.8.8.jar:?]
at bcz.c(SourceFile:50) ~[1.8.8.jar:?]
at bdb.b(SourceFile:135) ~[1.8.8.jar:?]
at bcy.a(SourceFile:890) ~[1.8.8.jar:?]
at gp.a(SourceFile:81) ~[1.8.8.jar:?]
at gp.a(SourceFile:10) ~[1.8.8.jar:?]
at fh$1.run(SourceFile:13) ~[1.8.8.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
at g.a(SourceFile:44) ~[1.8.8.jar:?]
... 3 more
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000007fee856d5d3, pid=2920, tid=4452
#
# JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [ig7icd64.dll+0x6d5d3]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\Owner\AppData\Roaming\.minecraft\hs_err_pid2920.log
Compiled method (c1) 59482 6294 2 bmt::a (11 bytes)
total in heap [0x0000000003809fd0,0x000000000380a950] = 2432
relocation [0x000000000380a0f0,0x000000000380a180] = 144
main code [0x000000000380a180,0x000000000380a480] = 768
stub code [0x000000000380a480,0x000000000380a578] = 248
oops [0x000000000380a578,0x000000000380a580] = 8
metadata [0x000000000380a580,0x000000000380a5c0] = 64
scopes data [0x000000000380a5c0,0x000000000380a838] = 632
scopes pcs [0x000000000380a838,0x000000000380a928] = 240
dependencies [0x000000000380a928,0x000000000380a930] = 8
nul chk table [0x000000000380a930,0x000000000380a950] = 32
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release