Put the summary of the bug you're having here

What I expected to happen was...:
Should have opened an existing or new world.

What actually happened was...:
Crash after world "appeared"

Copy of text from failure:

Completely ignored arguments: [--nativeLauncherVersion, 301]
[16:43:15] [Client thread/INFO]: Setting user: diggity60503
[16:43:15] [Client thread/INFO]: (Session ID is token:77303dbeb8614e7c9fd0a89e5baba1bc:194f0f6f70584ff48b1a7636874346a6)
[16:43:17] [Client thread/INFO]: LWJGL Version: 2.9.4
[16:43:18] [Client thread/INFO]: Reloading ResourceManager: Default
[16:43:19] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:43:19] [Thread-5/INFO]: Initializing LWJGL OpenAL
[16:43:19] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[16:43:19] [Thread-5/INFO]: OpenAL initialized.
[16:43:19] [Sound Library Loader/INFO]: Sound engine started
[16:43:21] [Client thread/INFO]: Created: 1024x512 textures-atlas
[16:43:41] [Server thread/INFO]: Starting integrated minecraft server version 1.9
[16:43:41] [Server thread/INFO]: Generating keypair
[16:43:42] [Server thread/INFO]: Preparing start region for level 0
[16:43:45] [Server thread/INFO]: Preparing spawn area: 0%
[16:43:46] [Server thread/INFO]: Preparing spawn area: 3%
[16:43:47] [Server thread/INFO]: Preparing spawn area: 9%
[16:43:48] [Server thread/INFO]: Preparing spawn area: 19%
[16:43:49] [Server thread/INFO]: Preparing spawn area: 47%
[16:43:50] [Server thread/INFO]: Preparing spawn area: 64%
[16:43:51] [Server thread/INFO]: Preparing spawn area: 68%
[16:43:52] [Server thread/INFO]: Preparing spawn area: 73%
[16:43:53] [Server thread/WARN]: Keeping entity Sheep that already exists with UUID c6e2b812-9043-437c-989c-d5070fc01a2c
[16:43:53] [Server thread/INFO]: Preparing spawn area: 77%
[16:43:54] [Server thread/INFO]: Preparing spawn area: 97%
[16:43:55] [Server thread/INFO]: Changing view distance to 16, from 10
[16:43:57] [Server thread/INFO]: diggity60503[local:E:abba272b] logged in with entity id 560 at (-1545.3592244634763, 56.0, -3586.699999988079)
[16:43:57] [Server thread/INFO]: diggity60503 joined the game
#

1. A fatal error has been detected by the Java Runtime Environment:
   #
2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffaa4132177, pid=7156, tid=5816
   #
3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C [ig75icd64.dll+0x12177]
   #
7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
   #
8. An error report file with more information is saved as:
9. C:\Users\WillowBuck\AppData\Roaming\.minecraft\hs_err_pid7156.log
   #
10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. 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